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Lansom J, Liew I, Ng KS, Ly T, Naidu K, Chapuis P, Chan C. Right vs. Left colorectal cancer - Where do we draw the line? Hum Pathol 2024; 151:105634. [PMID: 39117025 DOI: 10.1016/j.humpath.2024.105634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/25/2024] [Accepted: 08/05/2024] [Indexed: 08/10/2024]
Abstract
PURPOSE No consensus on the definition of right and left colorectal cancer (CRC) exists, nor studies offering histological or molecular basis for such categorisation. This study investigated the regional variations in the histological and molecular characteristics of CRCs, with the objective of determining an optimal division point between right and left CRCs. MATERIALS AND METHODS An observational study of consecutive patients who underwent CRC resection (1995-2022) at Concord Hospital, Sydney was performed. Clinicopathological data were extracted from a prospective database and seven permutations of right-left divisions considered. Logistic regression tested association between the right-left divisions and pathological characteristics. Receiver operating characteristic and area under the curve (AUC) analyses determined the discriminative ability of each division to predict 18 pathology characteristics. RESULTS 3753 patients underwent a CRC resection (2120 male; mean 69.5yrs [SD12.6]). There was regional variation in tumours with respect to tumour infiltrating lymphocytes (TILs), mismatch repair deficiency (dMMR), and mutant BRAF (mBRAF). Left-sided tumours were less likely to demonstrate TILs (P < 0.001), be dMMR (P < 0.001), and express mBRAF (P < 0.001). Division at the descending-sigmoid junction yielded highest discriminative abilities: TILs - AUC 0.66, dMMR - AUC 0.76, and mBRAF - AUC 0.73. CONCLUSION This is the first study to provide a pathological basis on which right- and left-sided cancers may be defined, and found the optimal division point between the right and left colorectum to be at the descending-sigmoid junction. Further research is needed to determine whether this can facilitate individualised patient management.
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Affiliation(s)
- Joshua Lansom
- Colorectal Surgery Unit, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia; Concord Institute of Academic Surgery, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia.
| | - Ian Liew
- University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; Department of Anatomical Pathology, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia
| | - Kheng-Seong Ng
- Colorectal Surgery Unit, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia; Concord Institute of Academic Surgery, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia
| | - Theresa Ly
- University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; Department of Anatomical Pathology, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia
| | - Krishanth Naidu
- Colorectal Surgery Unit, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia; Concord Institute of Academic Surgery, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia
| | - Pierre Chapuis
- Colorectal Surgery Unit, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia; Concord Institute of Academic Surgery, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia
| | - Charles Chan
- University of Sydney, Concord Clinical School, Clinical Sciences Building, Concord Hospital, Hospital Rd, Concord, NSW, 2139, Australia; Department of Anatomical Pathology, Concord Hospital, Hospital Rd, Concord, NSW, 2139 Australia
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Naidu K, Chapuis PH, Chan C, Rickard MJFX, West NP, Jayne DG, Ng KS. Tissue morphometric measurements do not predict survival following colorectal cancer surgery. World J Surg Oncol 2024; 22:216. [PMID: 39174976 PMCID: PMC11340191 DOI: 10.1186/s12957-024-03496-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2024] [Accepted: 08/10/2024] [Indexed: 08/24/2024] Open
Abstract
BACKGROUND Ex vivo tissue morphometric (TM) measurements have been proposed as a quality marker for colorectal cancer (CRC) surgery. However, their survival associations require clarification. This study aimed to evaluate the feasibility of capturing TM measurements based on ex vivo fresh specimen images and explore the association between these TM measurements and survival outcomes. METHODS A prospective cohort study at Concord Hospital, Sydney was conducted with Stage I to III CRC patients (2009-2019) who underwent an anterior resection (AR) or right hemicolectomy (RH). Using high-resolution digital photographs of fresh CRC specimens, ex vivo tissue morphometric (TM) measurements-resected mesentery area (TM A), distances from high vascular tie to tumour (TM B) and bowel wall (TM C), and bowel length (TM D)-were recorded using Image J. Overall survival (OS) and disease-free survival (DFS) estimates and their associations to clinicopathological variables were investigated with Kaplan-Meier and Cox regression analyses. Linear regression models tested association between TM measurements and lymph node (LN) yield. RESULTS Of the 1,425 patients who underwent CRC surgery, TM measurements were performed on 312 patients, with an average age of 69.4 years (SD 12.3), of whom 52.9% were male. The majority had an AR (57.8%). Among AR patients, a 5-year OS rate of 77.4% and a DFS rate of 70.1% were observed, with TM measurements bearing no relationship to survival outcomes. Similarly, RH patients exhibited a 5-year OS rate of 67.2% and a DFS rate of 63.1%, with TM measurements again showing no association with survival. Only TM D (P = 0.02) measurements were associated with the number of LNs examined. CONCLUSION This study successfully demonstrates the feasibility of measuring TM measurements on photographs of ex vivo fresh specimens following CRC surgery. The lack of association with survival outcomes questions the utility of TM measurements as a quality metric of CRC surgery.
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Affiliation(s)
- Krishanth Naidu
- Colorectal Surgery Unit, Concord Hospital, Concord, NSW, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Building 20, Level 1, Hospital Road, Concord, NSW, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, University of Sydney, Concord Hospital, Concord, NSW, 2139, Australia
| | - Pierre H Chapuis
- Colorectal Surgery Unit, Concord Hospital, Concord, NSW, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Building 20, Level 1, Hospital Road, Concord, NSW, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, University of Sydney, Concord Hospital, Concord, NSW, 2139, Australia
| | - Charles Chan
- Concord Clinical School, Clinical Sciences Building, University of Sydney, Concord Hospital, Concord, NSW, 2139, Australia
- Department of Anatomical Pathology, Concord Hospital, Concord, NSW, 2139, Australia
| | - Matthew J F X Rickard
- Colorectal Surgery Unit, Concord Hospital, Concord, NSW, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Building 20, Level 1, Hospital Road, Concord, NSW, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, University of Sydney, Concord Hospital, Concord, NSW, 2139, Australia
| | - Nicholas P West
- Pathology and Data Analytics, Leeds Institute of Medical Research, University of Leeds, Leeds, UK
| | - David G Jayne
- John Goligher Colorectal Unit, St. James's University Hospital, Leeds, UK
- Academic Surgery, Leeds Institute of Medical Research at St. James's, University of Leeds, Leeds, UK
| | - Kheng-Seong Ng
- Colorectal Surgery Unit, Concord Hospital, Concord, NSW, 2139, Australia.
- Concord Institute of Academic Surgery, Concord Hospital, Building 20, Level 1, Hospital Road, Concord, NSW, 2139, Australia.
- Concord Clinical School, Clinical Sciences Building, University of Sydney, Concord Hospital, Concord, NSW, 2139, Australia.
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Nyström K, Olsson L. A systematic review of population-based studies on metachronous metastases of colorectal cancer. World J Surg 2024; 48:1521-1533. [PMID: 38747538 DOI: 10.1002/wjs.12204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/22/2024] [Indexed: 06/13/2024]
Abstract
BACKGROUND The occurrence of metachronous metastases (MM) of colorectal (CRC), colon (CC), and rectal (RC) cancer of population-based studies has not been compiled in a systematic review previously. METHODS MEDLINE, Embase, and Cochrane Library were searched for primary studies of any design from inception until January 2021 and updated in August 2023 (CRD42021261648). The PRISMA guidelines were adopted, and the Newcastle-Ottawa Quality Assessment Scale used for risk of bias assessment. Outcomes on overall and organ-specific MM were extracted. A narrative analysis followed. RESULTS Out of 2143 unique hits, 162 publications were read in full-text and 37 population-based cohort studies published in 1981-2022 were included. Ten studies adopted time-dependent analyses; eight were registry-based and seven had a low risk of bias. Three studies reported 5-year recurrence rate of MM overall of stages I-III; for CRC, it was 20.5%, for CC, it was 18% and 25.6%, and for RC, it was 23%. Four studies reported 5-year recurrence rate of organ-specific MM of stages I-III-for CRC, it was 2.2% and 5.5% for peritoneal metastases and 5.8% for lung metastases and for CC 4.5% for peritoneal metastases. Twenty-seven studies reported proportions of patients diagnosed with MM, but data on the length of follow-up was incomplete and varied widely. Proportions of patients with CRC stages I-III that developed MM overall was 14.4%-26.1% in 10 studies. In relation to the enrollment period, a downward trend may be discernible. CONCLUSION Studies adopting a more appropriate analysis were highly heterogeneous, whereas uncertain data of partly inadequate studies may indicate that MM are overall declining.
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Affiliation(s)
- Karin Nyström
- Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Department of Oncology, Örebro University Hospital, Örebro, Sweden
| | - Louise Olsson
- Faculty of Medicine and Health, Örebro University, Örebro, Sweden
- Centre for Assessment of Medical Technology, Örebro University Hospital, Örebro, Sweden
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Bertelsen CA, Olsen ASF, Gundestrup AK, Karlsen AA, Neuenschwander AU, Buchbjerg T, Iversen ER, Bols B, Ingeholm P, Kleif J. Validation of the German classification system for quality assessment of right-sided colon cancer specimens. Colorectal Dis 2023; 25:1622-1630. [PMID: 37353896 DOI: 10.1111/codi.16640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/04/2023] [Accepted: 05/04/2023] [Indexed: 06/25/2023]
Abstract
AIM The German classification system of the completeness of mesocolic excision aims to assess the quality of right-sided colonic cancer surgery by review of photographs. We aimed to validate the reliability of the classification in a clinical context. METHOD The study was based on a cohort of patients undergoing resection for right-sided colon cancer in two university hospitals served by the same group of pathologists. Prospectively collected photographs of the specimens were assessed twice by six colorectal surgeons to determine the intra-rater and inter-rater accuracy of the German classification and a modification assessing extended right-sided resections. RESULTS Specimens from 613 resections for right-sided colon cancer were reviewed. Twenty-one specimens were found to be non-assessable, leaving 436 right hemicolectomies, 139 extended right hemicolectomies and 17 right-sided subtotal colectomies. Intra-rater reliability was 0.57-0.74 and weighted kappa coefficients 0.58-0.74, without differences between subgroups. The percentage of agreement between all six participants was 20.3% for all specimens, 21.1% for right hemicolectomy specimens and 18.1% for extended hemicolectomy and right-sided subtotal colectomy specimens. For the right hemicolectomy specimens, the model-based kappa coefficient for agreement was 0.27 (95% CI 0.24-0.30) and for association 0.45 (95% CI 0.41-0.49). CONCLUSION The German classification of right hemicolectomy specimens showed low intra-rater reliability and inter-rater agreement and association. The use of this classification for scientific purposes appeared not to be reliable.
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Affiliation(s)
- Claus Anders Bertelsen
- Department of Surgery, Copenhagen University Hospital - North Zealand, Hillerød, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anna Sofie Friis Olsen
- Department of Surgery, Copenhagen University Hospital - North Zealand, Hillerød, Denmark
| | | | | | | | - Thomas Buchbjerg
- Department of Surgery, Odense University Hospital - Svendborg, Svendborg, Denmark
| | - Else Refsgaard Iversen
- Department of Surgery, Copenhagen University Hospital - Herlev and Gentofte, Herlev, Denmark
| | - Birgitte Bols
- Department of Pathology, Copenhagen University Hospital - Herlev and Gentofte, Herlev, Denmark
| | - Peter Ingeholm
- Department of Pathology, Copenhagen University Hospital - Herlev and Gentofte, Herlev, Denmark
| | - Jakob Kleif
- Department of Surgery, Copenhagen University Hospital - North Zealand, Hillerød, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Naidu K, Chapuis PH, Brown KGM, Chan C, Rickard MJFX, Ng KS. Splenic flexure cancer survival: a 25-year experience and implications for complete mesocolic excision (CME) and central vascular ligation (CVL). ANZ J Surg 2023; 93:1861-1869. [PMID: 36978261 DOI: 10.1111/ans.18434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 03/08/2023] [Accepted: 03/14/2023] [Indexed: 03/30/2023]
Abstract
BACKGROUND The management of splenic flexure cancers (SFCs) in the era of complete mesocolic excision (CME) and central vascular ligation (CVL) is challenging because of its variable lymphatic drainage. This study aimed to compare survival outcomes for SFCs and non-SFCs, and better understand the clinicopathological characteristics which may define a distinct SFC phenotype. METHODS An observational cohort study at Concord Hospital, Sydney was conducted with patients who underwent resection for colon adenocarcinoma (1995-2019). Clinicopathological data were extracted from a prospective database. Overall survival (OS) and disease-free survival (DFS) estimates and their associations to clinicopathological variables were investigated with Kaplan-Meier and Cox regression analyses. RESULTS Of 2149 patients with colon cancer, 129 (6%) had an SFC. The overall 5-year OS and DFS rates were 63.6% (95% CI 62.5-64.7) and 59.4% (95% CI 58.3-60.5), respectively. SFCs were not associated with OS (P = 0.6) or DFS (P = 0.5). SFCs were more likely to present urgently (P < 0.001) with obstruction (P < 0.001) or perforation (P = 0.03), and more likely to require an open operation (P < 0.001). These characteristics were associated with poorer survival outcomes. No differences were noted between SFCs and non-SFCs with respect to tumour stage (P = 0.3). CONCLUSION SFCs have a distinct phenotype, the individual characteristics of which are associated with poorer survival. However, the survivals of SFCs and non-SFCs are similar, possibly because the most important determinant of outcome, tumour stage, is no different between the groups. This may have implications for the surgical approach to SFCs with respect to standardization of CME and CVL surgery for these cancers.
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Affiliation(s)
- Krishanth Naidu
- Colorectal Surgery Unit, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, Concord Hospital, University of Sydney, Sydney, New South Wales, 2139, Australia
| | - Pierre H Chapuis
- Colorectal Surgery Unit, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, Concord Hospital, University of Sydney, Sydney, New South Wales, 2139, Australia
| | - Kilian G M Brown
- Colorectal Surgery Unit, Concord Hospital, Sydney, New South Wales, 2139, Australia
| | - Charles Chan
- Concord Clinical School, Clinical Sciences Building, Concord Hospital, University of Sydney, Sydney, New South Wales, 2139, Australia
- Department of Anatomical Pathology, Concord Hospital, Sydney, New South Wales, 2139, Australia
| | - Matthew J F X Rickard
- Colorectal Surgery Unit, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, Concord Hospital, University of Sydney, Sydney, New South Wales, 2139, Australia
| | - Kheng-Seong Ng
- Colorectal Surgery Unit, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Institute of Academic Surgery, Concord Hospital, Sydney, New South Wales, 2139, Australia
- Concord Clinical School, Clinical Sciences Building, Concord Hospital, University of Sydney, Sydney, New South Wales, 2139, Australia
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Bertelsen CA, Neuenschwander AU, Kleif J. Risk of Local Recurrence After Complete Mesocolic Excision for Right-Sided Colon Cancer: Post-Hoc Sensitivity Analysis of a Population-Based Study. Dis Colon Rectum 2022; 65:1103-1111. [PMID: 34856593 DOI: 10.1097/dcr.0000000000002174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND A causal treatment effect of complete mesocolic excision for right-sided colon cancer on the risk of recurrence has been shown, but it is still unclear whether this is caused solely by a risk reduction of local recurrence. OBJECTIVE The goal of this study was to assess to what extent complete mesocolic excision contributes to the risk of local recurrence. DESIGN This study was a posthoc analyses of data from a population-based cohort. Inverse probability of treatment weighting and competing risk analyses were used to estimate the possible causal effects of complete mesocolic excision. SETTING Data were collected from the 4 public colorectal cancer centers in the Capital Region of Denmark. PATIENTS Patients undergoing elective colon resections for right-sided colon cancer without distant metastases during the period 2010-2013 were included. One center performed complete mesocolic excision and the remaining 3 centers performed conventional resections. MAIN OUTCOME MEASURES The primary outcome was the cumulative incidence of solely local recurrence 5.2 years after surgery. Secondary outcomes were solely distant recurrence and both local and distant recurrence diagnosed within 180 days. RESULTS A total of 807 patients were included with 186 undergoing complete mesocolic excision and 621 conventional resections. The 5.2-year cumulative incidence of a solely local recurrence was 3.7% (95% CI, 0.5-6.1) after complete mesocolic excision compared with 7.0% (5.0-8.9) in the control group, and the absolute risk reduction of complete mesocolic excision was 3.7% (2.5-7.1; p = 0.035). The absolute risk reduction on local and distant recurrence was 3.4% (1.3-5.6; p = 0.002) and on solely distant recurrence was 3.1% (0.0-6.2; p = 0.052). LIMITATIONS The recurrence risk after conventional resection might be underestimated by the use of inappropriate modalities to diagnose local recurrence for some patients and the shorter duration in this group. CONCLUSION This study shows a causal treatment effect of complete mesocolic excision on the risk of a solely local recurrence and of distant recurrence with or without local recurrence. See Video Abstract at http://links.lww.com/DCR/B832 .RIESGO DE RECURRENCIA LOCAL DESPUÉS DE LA ESCISIÓN MESOCÓLICA COMPLETA PARA EL CÁNCER DE COLON DEL LADO DERECHO: ANÁLISIS DE SENSIBILIDAD POST-HOC DE UN ESTUDIO POBLACIONALANTECEDENTES:Se ha demostrado un efecto del tratamiento causal de la escisión mesocólica completa para el cáncer de colon del lado derecho sobre el riesgo de recurrencia, pero aún no está claro si esto se debe únicamente a una reducción del riesgo de recurrencia local.OBJETIVO:Evaluar en qué medida la escisión mesocólica completa se atribuye al riesgo de recurrencia local.DISEÑO:Análisis posthoc de datos de una cohorte poblacional. Se utilizaron análisis de probabilidad inversa de ponderación del tratamiento y de riesgo competitivo para estimar los posibles efectos causales de la escisión mesocólica completa.AJUSTE:Datos de los cuatro centros públicos de cáncer colorrectal en la Región Capital de Dinamarca.PACIENTES:Pacientes sometidos a resecciones de colon electivas por cáncer de colon derecho sin metástasis a distancia durante el período 2010-2013. Un centro realizó escisión mesocólica completa, el resto resecciones convencionales.PRINCIPALES MEDIDAS DE RESULTADO:El resultado primario fue la incidencia acumulada de la recidiva local únicamente, 5,2 años después de la cirugía. Los resultados secundarios fueron únicamente la recidiva a distancia y ambas,la recidiva local y a distancia diagnosticada dentro de los 180 días.RESULTADOS:Se incluyeron un total de 807 pacientes, 186 sometidos a escisión mesocólica completa y 621 resecciones convencionales. La incidencia acumulada de 5,2 años de una recidiva únicamente local fue del 3,7% (IC del 95%: 0,5 a 6,1) después de la escisión mesocólica completa en comparación con el 7,0% (5,0 a 8,9) en el grupo de control, y la reducción del riesgo absoluto de la escisión mesocólica completa fue del 3,7% (2,5-7,1; p = 0,035). La reducción del riesgo absoluto de recidiva local y distante fue del 3,4% (1,3-5,6; p = 0,0019) y de recidiva únicamente a distancia 3,1% (0,0-6,2; p = 0,052).LIMITANTES:El riesgo de recurrencia después de la resección convencional podría subestimarse por el uso de modalidades inapropiadas para el diagnostico de la recurrencia local en algunos pacientes y la duración más corta en este grupo.CONCLUSIÓN:Este estudio muestra un efecto del tratamiento causal de la escisión mesocólica completa sobre el riesgo de una recidiva únicamente local y de recidiva a distancia con o sin recidiva local. Consulte Video Resumen en http://links.lww.com/DCR/B832 . (Traducción-Dr. Mauricio Santamaria ).
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Affiliation(s)
- Claus Anders Bertelsen
- Department of Surgery, Nordsjællands Hospital, Hillerød, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | | | - Jakob Kleif
- Department of Surgery, Nordsjællands Hospital, Hillerød, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Finding Waldo: The Evolving Paradigm of Circulating Tumor DNA (ctDNA)—Guided Minimal Residual Disease (MRD) Assessment in Colorectal Cancer (CRC). Cancers (Basel) 2022; 14:cancers14133078. [PMID: 35804850 PMCID: PMC9265001 DOI: 10.3390/cancers14133078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/21/2022] [Accepted: 06/21/2022] [Indexed: 11/23/2022] Open
Abstract
Simple Summary After the surgical removal of colorectal cancer (CRC), residual cancer cells undetectable by standard blood tests and imaging studies are responsible for cancer recurrence. Currently, chemotherapy is often administered after surgery to eradicate residual cancer cells, a decision guided by clinical and pathologic criteria, which are imprecise. Circulating tumor DNA (ctDNA) consists of DNA fragments in the bloodstream derived from cancer cells, and the presence of ctDNA likely indicates the presence of residual cancer cells. The current article discusses how ctDNA technology can help guide treatment in patients with CRC after curative surgery. Abstract Circulating tumor DNA (ctDNA), the tumor-derived cell-free DNA fragments in the bloodstream carrying tumor-specific genetic and epigenetic alterations, represents an emerging novel tool for minimal residual disease (MRD) assessment in patients with resected colorectal cancer (CRC). For many decades, precise risk-stratification following curative-intent colorectal surgery has remained an enduring challenge. The current risk stratification strategy relies on clinicopathologic characteristics of the tumors that lacks precision and results in over-and undertreatment in a significant proportion of patients. Consequently, a biomarker that can reliably identify patients harboring MRD would be of critical importance in refining patient selection for adjuvant therapy. Several prospective cohort studies have provided compelling data suggesting that ctDNA could be a robust biomarker for MRD that outperforms all existing clinicopathologic criteria. Numerous clinical trials are currently underway to validate the ctDNA-guided MRD assessment and adjuvant treatment strategies. Once validated, the ctDNA technology will likely transform the adjuvant therapy paradigm of colorectal cancer, supporting ctDNA-guided treatment escalation and de-escalation. The current article presents a comprehensive overview of the published studies supporting the utility of ctDNA for MRD assessment in patients with CRC. We also discuss ongoing ctDNA-guided adjuvant clinical trials that will likely shape future adjuvant therapy strategies for patients with CRC.
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Tsarkov PV, Efetov SK, Zubayraeva AA, Puzakov KB, Oganyan NV. Surgeon's role in CT-based preoperative determination of inferior mesenteric artery anatomy in colorectal cancer treatment. Khirurgiia (Mosk) 2022:40-49. [PMID: 36073582 DOI: 10.17116/hirurgia202209140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
BACKGROUND The inferior mesenteric artery (IMA) is a blood vessel of great importance in left colon and rectal cancer surgery. We aimed to determine the role of surgeons in computed tomography (CT) based vascular anatomy interpretation. METHOD Patients with left colon and rectal cancer treated surgically with D3 lymph node dissection and selective vascular ligation were included in this study. All patients (n=250) underwent preoperative CT with intravenous contrast. The IMA anatomy was schematically depicted by surgeon based on CT interpretation. Intraoperatively anatomy was defined by skeletonisation of the IMA. All patients had segmental resection with selective vascular ligation. The concurrence of prospectively obtained results were evaluated by intraclass correlation and Kendall's tau-b test. Misinterpretation of IMA anatomy was analysed by CT-specialist. RESULTS The preoperative and intraoperative IMA anatomy features were correctly interpreted in 237 cases (in 94.8%) within skeletonisation extent, which is supported by high level of agreement and concordance of preoperative data regards to intraoperative findings (K=0.926; p<0.001; CC=0.912; p<0.001). As a result of the CT-based evaluation of the IMA, E, K, and H types of branching patterns were proposed. IMV position was mistakenly identified in 2.6% of cases. CONCLUSION Surgeons are able to evaluate the IMA anatomy accurately with CT and use it in routine preoperative planning. The E, K, and H branching types may be used when defining approach to skeletonisation and level of vascular ligation.
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Affiliation(s)
- P V Tsarkov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - S K Efetov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - A A Zubayraeva
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - K B Puzakov
- Sechenov First Moscow State Medical University, Moscow, Russia
| | - N V Oganyan
- Sechenov First Moscow State Medical University, Moscow, Russia
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Neoadjuvant Treatment Lowers the Risk of Mesopancreatic Fat Infiltration and Local Recurrence in Patients with Pancreatic Cancer. Cancers (Basel) 2021; 14:cancers14010068. [PMID: 35008232 PMCID: PMC8750596 DOI: 10.3390/cancers14010068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary After the implementation of an in-depth histopathological pancreas protocol, curative resection rates for pancreatic head cancers have drastically dropped. Standardized extended resections using embryo-anatomic landmarks (MPE), have recently been prooved to increase margin-negative resection rates. The mesopancreatic fat, excised during these extended resections, was infiltrated in the majority of the patients. Neoadjuvant treatment is an emerging topic of interest for pancreatic cancer patients. It remains unclear if these extended resections are still warranted in patients after neoadjuvant treatment. Neoadjuvant treatment lowered the risk for mesopancreatic fat infiltration and patients were less prone to local recurrence and margin positive resections when compared to patients after upfront surgery. However, the majority of the patients are yet diagnosed with mesopancreatic fat infiltration, justifying this extended approach synergistically with the treatment strategies for colorectal cancer. Abstract Background: Survival following surgical treatment of ductal adenocarcinoma of the pancreas (PDAC) remains poor. The recent implementation of the circumferential resection margin (CRM) into standard histopathological evaluation lead to a significant reduction in R0 rates. Mesopancreatic fat infiltration is present in ~80% of PDAC patients at the time of primary surgery and recently, mesopancreatic excision (MPE) was correlated to complete resection. To attain an even higher rate of R0(CRM−) resections in the future, neoadjuvant therapy in patients with a progressive disease seems a promising tool. We analyzed radiographic and histopathological treatment response and mesopancreatic tumor infiltration in patients who received neoadjuvant therapy prior to MPE. The aim of our study was to evaluate the need for MPE following neoadjuvant therapy and if multi-detector computed tomographically (MDCT) evaluated treatment response correlates with mesopancreatic (MP) infiltration. Method: Radiographic, clinicopathological and survival parameters of 27 consecutive patients who underwent neoadjuvant therapy prior to MPE were evaluated. The mesopancreatic fat tissue was histopathologically analyzed and the 1 mm-rule (CRM) was applied. Results: In the study collective, both the rate of R0 resection R0(CRM−) and the rate of mesopancreatic fat infiltration was 62.9%. Patients with MP infiltration showed a lower tumor response. Surgical resection status was dependent on MP infiltration and tumor response status. Patients with MDCT-predicted tumor response were less prone to MP infiltration. When compared to patients after upfront surgery, MP infiltration and local recurrence rate was significantly lower after neoadjuvant treatment. Conclusion: MPE remains warranted after neoadjuvant therapy. Mesopancreatic fat invasion was still evident in the majority of our patients following neoadjuvant treatment. MDCT-predicted tumor response did not exclude mesopancreatic fat infiltration.
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Osterman E, Ekström J, Sjöblom T, Kørner H, Myklebust TÅ, Guren MG, Glimelius B. Accurate population-based model for individual prediction of colon cancer recurrence. Acta Oncol 2021; 60:1241-1249. [PMID: 34279175 DOI: 10.1080/0284186x.2021.1953138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Prediction models are useful tools in the clinical management of colon cancer patients, particularly when estimating the recurrence rate and, thus, the need for adjuvant treatment. However, the most used models (MSKCC, ACCENT) are based on several decades-old patient series from clinical trials, likely overestimating the current risk of recurrence, especially in low-risk groups, as outcomes have improved over time. The aim was to develop and validate an updated model for the prediction of recurrence within 5 years after surgery using routinely collected clinicopathologic variables. MATERIAL AND METHODS A population-based cohort from the Swedish Colorectal Cancer Registry of 16,134 stage I-III colon cancer cases was used. A multivariable model was constructed using Cox proportional hazards regression. Three-quarters of the cases were used for model development and one quarter for internal validation. External validation was performed using 12,769 stage II-III patients from the Norwegian Colorectal Cancer Registry. The model was compared to previous nomograms. RESULTS The nomogram consisted of eight variables: sex, sidedness, pT-substages, number of positive and found lymph nodes, emergency surgery, lymphovascular and perineural invasion. The area under the curve (AUC) was 0.78 in the model, 0.76 in internal validation, and 0.70 in external validation. The model calibrated well, especially in low-risk patients, and performed better than existing nomograms in the Swedish registry data. The new nomogram's AUC was equal to that of the MSKCC but the calibration was better. CONCLUSION The nomogram based on recently operated patients from a population registry predicts recurrence risk more accurately than previous nomograms. It performs best in the low-risk groups where the risk-benefit ratio of adjuvant treatment is debatable and the need for an accurate prediction model is the largest.
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Affiliation(s)
- E. Osterman
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Department of Surgery, Region Gävleborg, Gävle, Sweden
| | - J. Ekström
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - T. Sjöblom
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - H. Kørner
- Institute of Clinical Science, University of Bergen, Bergen, Norway
- Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway
| | - T. Å. Myklebust
- Department of Registration, Cancer Registry of Norway, Oslo, Norway
- Department of Research and Innovation, Møre and Romsdal Hospital Trust, Ålesund, Norway
| | - M. G. Guren
- Department of Oncology, Oslo University Hospital, Oslo, Norway
| | - B. Glimelius
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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Ramser M, Kwok AMF, Maeda Y, Potter MA. Oncological and clinical outcomes after conventional right hemicolectomy. Langenbecks Arch Surg 2021; 406:2781-2788. [PMID: 34505198 DOI: 10.1007/s00423-021-02320-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 08/27/2021] [Indexed: 12/19/2022]
Abstract
PURPOSE Complete mesocolic excision (CME) has been proposed for better local control of colon cancer and to improve cancer-specific survival (CSS). However, CME may be associated with increased morbidity from bleeding during central vascular ligation. This study aimed to investigate the outcome of conventional right hemicolectomy, a traditional anatomical dissection along anatomical planes with radical excision of the central lymph nodes at the level of the origin of colic artery but without exposure of superior mesenteric vein and artery (SMV/SMA). METHOD This was a retrospective review of a cohort of all elective right hemicolectomies performed at a specialist tertiary unit during a five-year period (2011-2015). RESULTS Five-hundred-nineteen patients (271 female, a median age of 73.0 years (interquartile range (IQR) 65.0-80.0)) were included (Stage I disease: 2.7%, stage II: 53.2%, stage III: 33.3%, stage IV: 10.8%). At the latest follow-up (a median 47 months (IQR 29-67)), local recurrence occurred in 34 patients (6.6%). Three-year overall survival was 74.4% and 3-year CSS was 85.9%. Subgroup analysis for stage I-III showed local recurrence in 6.0%, sole distant recurrence in 7.6% while 19 patients (4.1%) suffered concomitant local and distant recurrence. The anastomotic leak rate was 1.0% and perioperative bleeding occurred in 1.2%. CONCLUSIONS Oncological outcomes comparable to those of CME can be achieved by conventional surgery but with low rates of bleeding complications and anastomotic leakage. The proposed advantages of CME should be carefully considered and balanced against patients' co-morbidities and potential complications.
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Affiliation(s)
- Michaela Ramser
- Department of Colorectal Surgery, Western General Hospital, Crewe Rd South, Edinburgh, EH4 2XU, UK.,Department of General Surgery, Kantonsspital Olten, Olten, Switzerland
| | - Allan M F Kwok
- Department of Colorectal Surgery, Western General Hospital, Crewe Rd South, Edinburgh, EH4 2XU, UK
| | - Yasuko Maeda
- Department of Colorectal Surgery, Western General Hospital, Crewe Rd South, Edinburgh, EH4 2XU, UK. .,Department of Clinical Surgery, University of Edinburgh, Edinburgh, UK.
| | - Mark A Potter
- Department of Colorectal Surgery, Western General Hospital, Crewe Rd South, Edinburgh, EH4 2XU, UK.,Department of Clinical Surgery, University of Edinburgh, Edinburgh, UK
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12
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Bertelsen CA, Neuenschwander AU, Kleif J. Recurrence after complete mesocolic excision for right-sided colon cancer: post hoc sensitivity analyses-early recurrence, surgery by specialist and dissection in the mesocolic plane. Colorectal Dis 2021; 23:1971-1981. [PMID: 34314557 DOI: 10.1111/codi.15846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/20/2021] [Accepted: 07/20/2021] [Indexed: 02/08/2023]
Abstract
AIM The aim was to investigate whether the previously reported causal treatment effect of complete mesocolic excision on the risk of recurrence was biased by inclusion of patients with potentially undiagnosed disseminated disease at the time of surgery, by non-specialist surgery, or caused by mesocolic plane dissection. METHOD A population of 1069 patients, 813 undergoing conventional resection and 256 complete mesocolic excision for colon cancer during the period 2008-2013, was stepwise reduced in the following order by excluding patients with recurrence diagnosed within 6 months of the resection, having surgery performed by a non-specialist without supervision, and specimens assessed as not being mesocolic plane dissection. The primary outcome measure was risk of recurrence after 5.2 years using competing risk analyses. RESULTS The absolute risk reduction of complete mesocolic excision was 6.0% (95% CI 1.8-10.2; P = 0.0049) after excluding patients with recurrence within 6 months of resection, 6.1% (95% CI 1.9-10.4; P = 0.0045) after excluding non-specialist surgery, and 7.5% (95% CI 2.9-12.0; P = 0.0013) after the exclusion of patients whose specimens were assessed as dissections not being performed in the mesocolic plane. CONCLUSION The absolute risk reduction of recurrence after complete mesocolic excision for right-sided colon cancer in our previous study was not biased by potentially undiagnosed disseminated disease at the time of surgery or non-specialist surgery, and was not solely caused by dissection in the mesocolic plane. Central vascular dissection with central lymphadenectomy seems a major factor for better oncological results.
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Affiliation(s)
- Claus Anders Bertelsen
- Department of Surgery, Nordsjaellands Hospital, Hillerød, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen N, Denmark
| | | | - Jakob Kleif
- Department of Surgery, Nordsjaellands Hospital, Hillerød, Denmark.,Department of Clinical Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen N, Denmark
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13
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Vogelsang RP, Gögenur M, Dencker D, Bjørn Bennedsen AL, Levin Pedersen D, Gögenur I. Routine CT evaluation of central vascular ligation in patients undergoing complete mesocolic excision for sigmoid colon cancer. Colorectal Dis 2021; 23:2030-2040. [PMID: 33974325 DOI: 10.1111/codi.15723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 02/23/2021] [Accepted: 05/04/2021] [Indexed: 02/08/2023]
Abstract
AIM Objective and reproducible quality measures of complete mesocolic excision (CME) for colon cancer are not currently available. This study aimed to measure the inferior mesenteric stump length following CME for sigmoid colon cancer and explore surgical, pathological and oncological outcomes in patients with a stump length of <10 mm vs. ≥10 mm. METHOD This was a single-centre, retrospective cohort study including patients undergoing minimally invasive surgery for sigmoid colon cancer between May 2013 and May 2015. Follow-up CT scans were reviewed, and a vascular stump cut-off of <10 mm for adequate central ligation of the inferior mesenteric artery was applied. Differences in perioperative, histopathological and oncological outcome parameters (overall, disease-free and recurrence-free survival) were explored between <10 mm vs. ≥10 mm groups. RESULTS A total of 127 patients (43% female) with a median age of 68 years were included. The median follow-up time was 68 months. CT measurements showed good interrater agreement (90% absolute agreement) and reliability among raters (kappa = 0.77, 95% CI 0.53-1.00, p < 0.001). A stump length ≥10 mm was associated with longer operating time (150 vs. 180 min, p = 0.021), intramesocolic resection (p = 0.008), and a shorter distance from the bowel wall to vascular tie (120 vs. 102 mm, p = 0.005). CONCLUSION An arterial stump length ≥10 mm in sigmoid resection for colon cancer was associated with key clinical quality measures. Measurement of arterial stump length using routine follow-up CT may serve as a quality indicator of vascular ligation in CME surgery.
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Affiliation(s)
| | - Mikail Gögenur
- Center for Surgical Science, Department of Surgery, Zealand University Hospital, Koege, Denmark
| | - Ditte Dencker
- Department of Radiology, Zealand University Hospital, Koege, Denmark.,Department of Diagnostic Radiology, Rigshospitalet, Copenhagen, Denmark
| | | | | | - Ismail Gögenur
- Center for Surgical Science, Department of Surgery, Zealand University Hospital, Koege, Denmark.,Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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Osterman E, Hammarström K, Imam I, Osterlund E, Sjöblom T, Glimelius B. Completeness and accuracy of the registration of recurrences in the Swedish Colorectal Cancer Registry (SCRCR) and an update of recurrence risk in colon cancer. Acta Oncol 2021; 60:842-849. [PMID: 33689551 DOI: 10.1080/0284186x.2021.1896033] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BACKGROUND The completeness and accuracy of the registration of synchronous metastases and recurrences in the Swedish Colorectal Cancer Registry has not been investigated. Knowing how accurate these parameters are in the registry is a prerequisite to adequately measure the current recurrence risk. METHODS All charts for patients diagnosed with stage I-III colorectal cancer (CRC) in two regions were reviewed. In one of the regions, all registrations of synchronous metastases were similarly investigated. After the database had been corrected, recurrence risk in colon cancer was calculated stratified by risk group as suggested by ESMO in 2020. RESULTS In patients operated upon more than five years ago (N = 1235), there were 20 (1.6%) recurrences not reported. In more recent patients, more recurrences were unreported (4.0%). Few synchronous metastases were wrongly registered (3.6%) and, likewise, few synchronous metastases were not registered (about 1%). The five-year recurrence risk in stage II was 6% for low-risk, 11% for intermediate risk, and 23% for high-risk colon cancer patients. In stage III, it was 25% in low- and 45% in high-risk patients. Incorporation of risk factors in stage III modified the risks substantially even if this is not considered by ESMO. Adjuvant chemotherapy lowered the risk in stage III but not to any relevant extent in stage II. CONCLUSION The registration of recurrences in the registry after 5 years is accurate to between 1 and 2% but less accurate earlier. A small number of unreported recurrences and falsely reported recurrences were discovered in the chart review. The recurrence risk in this validated and updated patient series matches what has been recently reported, except for the risk of recurrence in stage II low risk colon cancers which seem to be even a few percentage points lower (6 vs. 9%).
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Affiliation(s)
- Erik Osterman
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
- Department of Surgery, Region Gävleborg, Gävle Hospital, Gävle, Sweden
| | - Klara Hammarström
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Israa Imam
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Emerik Osterlund
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Tobias Sjöblom
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Bengt Glimelius
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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Bernhoff R, Sjövall A, Granath F, Holm T, Martling A, Buchli C. Oncological outcomes after complete mesocolic excision in right-sided colon cancer: a population-based study. Colorectal Dis 2021; 23:1404-1413. [PMID: 33624416 DOI: 10.1111/codi.15601] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/06/2021] [Accepted: 02/17/2021] [Indexed: 12/15/2022]
Abstract
AIM Complete mesocolic excision (CME) has been proposed as the preferred surgical technique for resection of colon cancer. This prospective cohort study evaluates the effect of CME surgery on colon cancer mortality after right-sided hemicolectomy on a population level. METHODS Data from the Swedish Colorectal Cancer Registry and the Cause of Death Registry on all patients treated with elective right-sided hemicolectomy for colon cancer Stages I-III in the Stockholm County 2008-2012 were analysed. Adherence to principles of CME surgery was determined by structured analysis of anonymized surgical reports regarding the presence of five essential features. The exposure to CME was graded as group 0 (not exposed to CME), group 1 (intermediate) and group 2 (exposed to CME). RESULTS In total, 1171 patients were analysed with 234 (20.0%) patients in CME group 0, 453 (38.7%) patients in CME group 1 and 484 (41.3%) in CME group 2. The 5-year colon cancer mortality was 20.2% in CME group 0, 13.9% in CME group 1 and 13.1% in CME group 2 (P = 0.026). The adjusted hazard ratio for colon cancer mortality was 0.61 (95% CI 0.42-0.91; P = 0.014) for CME group 1 and 0.52 (95% CI 0.35-0.77; P = 0.001) for CME group 2. DISCUSSION The presence of predefined CME features in surgical reports was related to a graded benefit on cancer-specific mortality after right-sided hemicolectomy for colon cancer Stages I-III.
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Affiliation(s)
- Richard Bernhoff
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Surgery, Capio St Göran Hospital, Stockholm, Sweden
| | - Annika Sjövall
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Division of Coloproctology, A5:01, Karolinska University Hospital, Stockholm, Sweden
| | - Fredrik Granath
- Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Torbjörn Holm
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Department of Surgery, Södersjukhuset, Stockholm, Sweden
| | - Anna Martling
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Division of Coloproctology, A5:01, Karolinska University Hospital, Stockholm, Sweden
| | - Christian Buchli
- Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Division of Coloproctology, A5:01, Karolinska University Hospital, Stockholm, Sweden
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Zhou Z, Zhu H, Liu W, Tan F, Pei Q, Zhao L, Li C, Wang D, Zhou Y, Peng H, Pei H, Li Y. Has the increase in the regional nodes evaluated improved survival rates for patients with locoregional colon cancer? J Cancer 2021; 12:2513-2525. [PMID: 33854613 PMCID: PMC8040710 DOI: 10.7150/jca.52352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 02/14/2021] [Indexed: 01/01/2023] Open
Abstract
Background: The guidelines for colon cancer surgery have been evolving over the past three decades. The advances in colectomy have focused mainly on the number of regional nodes evaluated (RNE). Methods: Data in this retrospective analysis were extracted from the Surveillance, Epidemiology, and End Results (SEER) linked database. Results: Rapid growth of RNE (the median rising from 10 (6-16) to 17 (13-23)) occurred from 2000 to 2009. The rate of colon cancer patients with positive lymph nodes following colectomy was greatly decreasing only in the group with RNE greater than 12 after 2000. Patients with T4 and/or N+ cannot obtain survival benefit from the increasing trend of RNE. The apparent survival benefit for T1-3N0 patients may result from augmented false negatives in patients from previous periods. Conclusions: The golden period of surgical development in colon cancer, using RNE as an alternative indicator, occurred in the first decade of the 21st century. Although a more extensive lymph node evaluation is able to reduce the risk of underestimated staging, the increase of RNE does not provide survival benefits for locoregional colon cancer. A proper reduction in the scope of lymph node dissection may be reasonable in radical surgery for colon cancer.
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Affiliation(s)
- Zhongyi Zhou
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Hong Zhu
- Department of Radiotherapy, Xiangya Hospital, Central South University, Changsha, China
| | - Wenxue Liu
- Department of Cardiology, Xiangya Hospital, Central South University, Changsha, China.,Department of Rheumatology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Fengbo Tan
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Qian Pei
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Lilan Zhao
- Department of Thoracic surgery, Fujian Provincial Hospital, Fuzhou, China
| | - Chenglong Li
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Dan Wang
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China.,Department of General Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Yuan Zhou
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Huan Peng
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Haiping Pei
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Yuqiang Li
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, China.,Department of General Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Siddiqi N, Stefan S, Jootun R, Mykoniatis I, Flashman K, Beable R, David G, Khan J. Robotic Complete Mesocolic Excision (CME) is a safe and feasible option for right colonic cancers: short and midterm results from a single-centre experience. Surg Endosc 2021; 35:6873-6881. [PMID: 33399993 PMCID: PMC8599208 DOI: 10.1007/s00464-020-08194-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Complete mesocolic excision (CME) for right colon cancers has traditionally been an open procedure. Surgical adoption of minimal access CME remains limited due to the technical challenges, training gaps and lack of level-1 data for proven benefits. Currently there is limited published data regarding the clinical results with the use of robotic CME surgery. Aim To report our experience, results and techniques, highlighting a clinical and oncological results and midterm oncological outcomes for robotic CME. AIM To report our experience, results and techniques, highlighting a clinical and oncological results and midterm oncological outcomes for robotic CME. METHODS All patients undergoing standardised robotic CME technique with SMV first approach between January 2015 and September 2019 were included in this retrospective review of a prospectively collected database. Patient demographics, operative data and clinical and oncological outcomes were recorded. RESULTS Seventy-seven robotic CME resections for right colonic cancers were performed over a 4-year period. Median operative time was 180 (128-454) min and perioperative blood loss was 10 (10-50) ml. There were 25 patients who had previous abdominal surgery. Median postoperative hospital stay was 5 (3-18) days. There was no conversion to open surgery in this series. Median lymph node count was 30 (10-60). Three (4%) patients had R1 resection. There was one (1%) local recurrence in stage III disease and 4(5%) distal recurrence in stage II and stage III. There was no 30- or 90-day mortality. Three-year disease-free survival was 100%, 91.7% and 92% for stages I, II and III, respectively. Overall survival was 94%. CONCLUSIONS Robotic CME is feasible, effective and safe. Good oncological results and improved survival are seen in this cohort of patients with a standardised approach to robotic CME.
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Affiliation(s)
- Najaf Siddiqi
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK.,University of Portsmouth, Portsmouth, UK
| | - Samuel Stefan
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK.,University of Portsmouth, Portsmouth, UK
| | - Ravish Jootun
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK
| | - Ioannis Mykoniatis
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK
| | - Karen Flashman
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK
| | - Richard Beable
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK
| | - Gerald David
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK
| | - Jim Khan
- Department of Colorectal Surgery, Portsmouth Hospitals NHS Trust, Queen Alexandra Hospital Portsmouth, Portsmouth, UK. .,University of Portsmouth, Portsmouth, UK.
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Recurrence Risk after Radical Colorectal Cancer Surgery-Less Than before, But How High Is It? Cancers (Basel) 2020; 12:cancers12113308. [PMID: 33182510 PMCID: PMC7696064 DOI: 10.3390/cancers12113308] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/27/2020] [Accepted: 11/06/2020] [Indexed: 02/06/2023] Open
Abstract
Simple Summary Evidence indicates that recurrence risk after colon cancer today is less than it was when trials performed decades ago showed that adjuvant chemotherapy reduces the risk and prolong disease-free and overall survival. After rectal cancer surgery, local recurrence rates have decreased but it is unclear if systemic recurrences have. After a systematic review of available literature reporting recurrence risks after curative colorectal cancer surgery we report that the risks are lower today than they were in the past and that this risk reduction is not solely ascribed to the use of adjuvant therapy. Adjuvant therapy always means overtreatment of many patients, already cured by the surgery. Fewer recurrences mean that progress in the care of these patients has happened but also that the present guidelines giving recommendations based upon old data must be adjusted. The relative gains from adding chemotherapy are not altered, but the absolute number of patients gaining is less. Abstract Adjuvant chemotherapy aims at eradicating tumour cells sometimes present after radical surgery for a colorectal cancer (CRC) and thereby diminish the recurrence rate and prolong time to recurrence (TTR). Remaining tumour cells will lead to recurrent disease that is usually fatal. Adjuvant therapy is administered based upon the estimated recurrence risk, which in turn defines the need for this treatment. This systematic overview aims at describing whether the need has decreased since trials showing that adjuvant chemotherapy provides benefits in colon cancer were performed decades ago. Thanks to other improvements than the administration of adjuvant chemotherapy, such as better staging, improved surgery, the use of radiotherapy and more careful pathology, recurrence risks have decreased. Methodological difficulties including intertrial comparisons decades apart and the present selective use of adjuvant therapy prevent an accurate estimate of the magnitude of the decreased need. Furthermore, most trials do not report recurrence rates or TTR, only disease-free and overall survival (DFS/OS). Fewer colon cancer patients, particularly in stage II but also in stage III, today display a sufficient need for adjuvant treatment considering the burden of treatment, especially when oxaliplatin is added. In rectal cancer, neo-adjuvant treatment will be increasingly used, diminishing the need for adjuvant treatment.
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Propensity-score-matched analysis of short- and long-term outcomes in patients with an ileocolic artery crossing anterior vs posterior to the superior mesenteric vein during curative resection for right-sided colon cancer. Surg Endosc 2020; 34:5384-5392. [PMID: 31993811 DOI: 10.1007/s00464-019-07333-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/24/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Colorectal cancer is one of the most common malignant diseases worldwide. However, laparoscopic lymph node dissection is technically demanding and time-consuming in right-sided colon cancer surgery because of variable vessel anatomy. We evaluated whether the ileocolic artery (ICA) crossing anterior to the superior mesenteric vein (SMV) was associated with better intraoperative parameters and survival compared with the ICA crossing posterior to the SMV, following laparoscopic curative resection for right-sided colon cancer. METHODS This was a propensity-score-matched retrospective study including data for 540 patients with right-sided colon cancer undergoing laparoscopic curative resection (299 with the ICA crossing anterior to the SMV (group A) and 241 with the ICA crossing posterior to the SMV (group B). We compared propensity-matched scores between the two groups to evaluate surgical and oncological outcomes. RESULTS We found no significant difference in 5-year overall survival rates between groups for any disease stage (0-III). However, 5-year disease-free survival (DFS) rates did differ significantly between groups (p = 0.011), especially in patients with stage III disease (p = 0.013). We then performed univariate and multivariate analyses to determine the associations between DFS and ICA location and tumor-node-metastasis (UICC) stage. ICA location and UICC stage had a poor association with DFS on univariate analysis: ICA hazard ratio (HR) 2.52, CI 1.19-5.78, p = 0.014 vs HR 3.18, CI 1.08-9.46, p = 0.03, and on multivariate analysis: HR 2.48, CI 1.17-5.69, p = 0.016 vs HR 3.86, CI 1.90-7.96, p = 0.0002. CONCLUSION Our results showed that an ICA crossing posterior to the SMV was associated with worse DFS compared with an ICA crossing anterior to the SMV. We recommend careful laparoscopic technique in patients with an ICA crossing posterior to the SMV, during lymph node resection in right-sided colon cancer surgery.
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Bertelsen CA, Neuenschwander AU, Jansen JE, Tenma JR, Wilhelmsen M, Kirkegaard-Klitbo A, Iversen ER, Bols B, Ingeholm P, Rasmussen LA, Jepsen LV, Born PW, Kristensen B, Kleif J. 5-year outcome after complete mesocolic excision for right-sided colon cancer: a population-based cohort study. Lancet Oncol 2019; 20:1556-1565. [PMID: 31526695 DOI: 10.1016/s1470-2045(19)30485-1] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/17/2019] [Accepted: 07/23/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND The benefits of extensive lymph node dissection as performed in complete mesocolic excision are still debated, although recent studies have shown an association with improved long-term outcomes. However, none of these studies had an intention-to-treat design or aimed to show a causal effect; therefore in this study, we aimed to estimate the causal oncological treatment effects of complete mesocolic excision on right-sided colon cancer. METHODS We did a population-based cohort study involving prospective data collected from four hospitals in Denmark. We compared the oncological outcome data of patients at one centre performing central lymph node dissection and vascular division after almost complete exposure of the proximal part of the superior mesenteric vein (ie, the complete mesocolic excision group) with three other centres performing conventional resections with unstandardised and limited lymph node dissection (ie, non-complete mesocolic excision; control group). We included data for all patients in the Capital Region of Denmark undergoing elective curative-intent right-sided colon resections for stages I-III colon cancer, as categorised by the Union for International Cancer Control (UICC; 5th edition), from June 1, 2008, to Dec 31, 2013. Patients were followed-up for 5·2 years after surgery. The primary outcome was the cumulative incidence of recurrence after 5·2 years of surgery. Inverse probability of treatment weighting and competing risk analyses were used to estimate the possible causal effects of complete mesocolic excision. This study is registered with ClinicalTrials.gov, number NCT03754075. FINDINGS 1069 patients (813 in the control group and 256 in the complete mesocolic excision group) underwent curative-intent elective surgery for right-sided colon cancer during the study period. None of the patients were lost to follow-up regarding survival or recurrence status, and consequently no patient was censored in the analyses. The 5·2-year cumulative incidence of recurrence was 9·7% (95% CI 6·3-13·1) in the complete mesocolic excision group compared with 17·9% (15·3-20·5) in the control group, and the absolute risk reduction of complete mesocolic excision after 5·2 years was 8·2% (95% CI 4·0-12·4; p=0·00015). In the control group, 145 (18%) of 813 patients were diagnosed with a recurrence and 281 (35%) died during follow-up, whereas in the complete mesocolic excision group 25 (10%) of 256 patients were diagnosed with a recurrence and 75 (29%) died during follow-up. INTERPRETATION This study shows a causal treatment effect of central mesocolic lymph node excision on risk of recurrence after resection for right-sided colon adenocarcinoma. Complete mesocolic excision has the potential to reduce the risk of recurrence and improve long-term outcome after resection for all UICC stages I-III of right-sided colon adenocarcinomas. FUNDING The Tvergaard Fund, Helen Rude Fund, Krista and Viggo Petersen Fund, Olga Bryde Nielsen Fund, and Else and Mogens Wedell-Wedellsborg Fund.
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Affiliation(s)
- Claus A Bertelsen
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark.
| | - Anders U Neuenschwander
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
| | - Jens E Jansen
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
| | - Jutaka R Tenma
- Department of Surgery, Bispebjerg University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Michael Wilhelmsen
- Gastro Unit, Surgical Division, Hvidovre Hospital, University of Copenhagen, Hvidovre, Denmark
| | - Anders Kirkegaard-Klitbo
- Department of Surgery, Bispebjerg University Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Surgery, Herlev University Hospital, University of Copenhagen, Herlev, Denmark
| | - Else R Iversen
- Department of Surgery, Herlev University Hospital, University of Copenhagen, Herlev, Denmark
| | - Birgitte Bols
- Department of Pathology, Herlev University Hospital, University of Copenhagen, Herlev, Denmark
| | - Peter Ingeholm
- Department of Pathology, Herlev University Hospital, University of Copenhagen, Herlev, Denmark
| | - Leif A Rasmussen
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
| | - Lars V Jepsen
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
| | - Pernille W Born
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
| | - Bent Kristensen
- Department of Clinical Physiology, Herlev University Hospital, University of Copenhagen, Herlev, Denmark
| | - Jakob Kleif
- Department of Surgery, Nordsjællands Hospital Hillerød, University of Copenhagen, Hillerød, Denmark
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Perrakis A, Vassos N, Weber K, Matzel KE, Papadopoulos K, Koukis G, Perrakis E, Croner RS, Hohenberger W. Introduction of complete mesocolic excision with central vascular ligation as standardized surgical treatment for colon cancer in Greece. Results of a pilot study and bi-institutional cooperation. Arch Med Sci 2019; 15:1269-1277. [PMID: 31572473 PMCID: PMC6764310 DOI: 10.5114/aoms.2018.80040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 09/28/2018] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Complete mesocolic excision (CME) is generally accepted as state of the art in colon cancer surgery. However, the long-term impact of CME has not been systematically examined. Therefore cohort studies might be a possible way to clarify any differences between conventional resections and CME. Following bilateral cooperation between the Department of Surgery/University Hospital of Erlangen and the 1st Surgical Department of the General Hospital of Nikaia/Piraeus, including teaching activities for introduction of CME, a cohort study was performed, considering surgical quality criteria and clinical outcome. MATERIAL AND METHODS All patients with colon carcinomas (CME group, n = 31) referred to the 1st Surgical Department of General Hospital, Nikaia/Piraeus, Greece for surgery from January 2012 to December 2013 were prospectively analyzed and compared with patients who underwent conventional surgery for colon cancer between January 2008 and December 2011 (non-CME group, n = 35). Patients' follow-up was at least 48 months. RESULTS There were significantly better results in terms of lymph node yield (CME group: 29.6 vs. non-CME group: 17.85; p < 0.001) and lymph node ratio (LNR) (CME group: 0.12 vs. non-CME group: 0.24; p < 0.001) and recurrence-free survival in favor of the CME group (CME group: n = 0 vs. non-CME group: n = 5) without any increase in surgical morbidity (CME group: n = 6 vs. non-CME group: n = 11; p = 0.10). CONCLUSIONS Complete mesocolic excision appears to offer a superior oncological result without any increase of postoperative morbidity and mortality. Furthermore, CME represents a surgical technique which can be established in a surgical department after previous teaching without increasing the postoperative complication rate.
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Affiliation(s)
- Aristotelis Perrakis
- Department of Surgery, University Hospital Erlangen, Erlangen, Germany
- Department of Surgery, University Hospital Magdeburg, Magdeburg, Germany
| | - Nikolaos Vassos
- Department of Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Klaus Weber
- Department of Surgery, University Hospital Erlangen, Erlangen, Germany
| | - Klaus E. Matzel
- Department of Surgery, University Hospital Erlangen, Erlangen, Germany
| | | | - Georgios Koukis
- 1 Surgical Department, General Hospital of Piraeus/Nikaia, Piraeus/Nikaia, Greece
| | - Evangelos Perrakis
- 1 Surgical Department, General Hospital of Piraeus/Nikaia, Piraeus/Nikaia, Greece
| | - Roland S. Croner
- Department of Surgery, University Hospital Erlangen, Erlangen, Germany
- Department of Surgery, University Hospital Magdeburg, Magdeburg, Germany
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Fingerhut A, Tzu-Liang Chen W, Boni L, Uranues S. Complete mesocolic excision for colonic cancer. MINERVA CHIR 2019; 74:148-159. [DOI: 10.23736/s0026-4733.18.07777-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Chapuis PH, Bokey E, Chan C, Keshava A, Rickard MJFX, Stewart P, Young CJ, Dent OF. Recurrence and cancer-specific death after adjuvant chemotherapy for Stage III colon cancer. Colorectal Dis 2019; 21:164-173. [PMID: 30253025 DOI: 10.1111/codi.14434] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 09/12/2018] [Indexed: 12/14/2022]
Abstract
AIM The recommended standard of care for patients after resection of Stage III colon cancer is adjuvant 5-fluorouracil based chemotherapy - FOLFOX (fluorouracil, leucovorin with oxaliplatin) - or CAPOX (capecitabine, oxaliplatin). This may be modified in older patients or depending on comorbidity. This has been challenged recently as the apparent benefit of adjuvant chemotherapy may arise from improvements in surgery or preoperative imaging or pathology staging. This study compares recurrence and colon-cancer-specific death between patients who received postoperative adjuvant chemotherapy and those who did not. METHOD Prospectively recorded data from 363 consecutive patients who had a resection for Stage III colonic adenocarcinoma between 1995 and 2010 inclusive were analysed. Surviving patients were followed for at least 5 years. The suitability of patients for chemotherapy was discussed routinely at multidisciplinary team meetings. The incidence of recurrence and colon-cancer-specific death was evaluated by competing risk methods. RESULTS After adjustment for the competing risk of non-colorectal cancer death, there was no significant difference in recurrence between the 204 patients who received chemotherapy and the 159 who did not [hazard ratio (HR) 0.94, 95% CI 0.66-1.32, P = 0.700) and no significant difference in colon-cancer-specific death (HR 0.73, 95% CI 0.50-1.04, P = 0.084; HR 0.88, 95% CI 0.57-1.36, P = 0.577 after adjustment for relevant covariates). CONCLUSION These findings question the routine use of chemotherapy after complete mesocolic excision for Stage III colon cancer. Recurrence and cancer-specific death, assessed by competing risk methods, should be the standard outcomes for evaluating the effectiveness of adjuvant chemotherapy after potentially curative resection.
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Affiliation(s)
- P H Chapuis
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia.,Discipline of Surgery, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - E Bokey
- Departments of Colorectal Surgery and Surgery, Liverpool Hospital, Sydney, New South Wales, Australia.,School of Medicine, Western Sydney University, Sydney, New South Wales, Australia
| | - C Chan
- Division of Anatomical Pathology, Concord Hospital, Sydney, New South Wales, Australia.,Discipline of Pathology, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - A Keshava
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia
| | - M J F X Rickard
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia
| | - P Stewart
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia
| | - C J Young
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia
| | - O F Dent
- Department of Colorectal Surgery, Concord Hospital, Sydney, New South Wales, Australia.,Discipline of Surgery, Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
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Laparoscopic Complete Mesocolic Excision for Right-Sided Colon Cancer: Analysis of Feasibility and Safety from a Single Western Center. J Gastrointest Surg 2019; 23:402-407. [PMID: 30430433 DOI: 10.1007/s11605-018-4040-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/29/2018] [Indexed: 01/31/2023]
Abstract
BACKGROUND Colectomies performed according to complete mesocolic excision (CME) principles have demonstrated an improvement in the quality of surgical specimen and a potential improvement of long-term results. Laparoscopic CME right hemicolectomy is considered a demanding procedure and adopted in few centers from the West. The main purpose of this paper is to present a video showing our technique for laparoscopic CME right hemicolectomy and to analyze our short-term results to prove its safety. METHODS Data from 38 patients operated on at the Division of General and Hepatobiliary Surgery, University of Verona Hospital Trust, between September 2014 and February 2017, were included in the study. RESULTS In the present series, 37% of patients were ≥75 years old, 32% of patients were ASA class 3, 46% of patients had ≥2 comorbidities, 30% of patients had BMI >28 and 17% of patients had ≥2 previous abdominal surgeries. Despite these unfavorable clinic characteristics, no mortality was observed, Clavien-Dindo ≥3 complications occurred in 13.1% and redo surgery in 5.3%. Good quality specimens were obtained with a mean (SD) length of 34.5±7.5 cm, a proximal margin of 16.8±9.2 cm and a distal margin of 14.3±6.4 cm. The mean (SD) number of harvested lymph nodes was 24.3 (8.3). CONCLUSIONS When implemented in a Western center, laparoscopic CME right hemicolectomy is feasible and safe and allows obtaining good quality specimens.
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Recurrence Risk After Up-to-Date Colon Cancer Staging, Surgery, and Pathology: Analysis of the Entire Swedish Population. Dis Colon Rectum 2018; 61:1016-1025. [PMID: 30086050 DOI: 10.1097/dcr.0000000000001158] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Developments in the quality of care of patients with colon cancer have improved surgical outcome and thus the need for adjuvant chemotherapy. OBJECTIVE To investigate the recurrence rate in a large population-based cohort after modern staging, surgery, and pathology have been implemented. DESIGN This was a retrospective registry study. SETTINGS Data from patients included in the Swedish Colorectal Cancer Registry covering 99% of all cases and undergoing surgery for colon cancer stages I to III between 2007 and 2012 were obtained. PATIENTS In total, 14,325 patients who did not receive any neoadjuvant treatment, underwent radical surgery, and were alive 30 days after surgery were included. MAIN OUTCOME MEASURES Tumor and node classification and National Comprehensive Cancer Network-defined risk factors for recurrence were used to assess overall and stage-specific 5-year recurrence rates. RESULTS The median follow-up of nonrecurrent cases was 77 months (range, 47-118 mo). The 5-year recurrence rate was 5% in stage I, 12% in stage II, and 33% in stage III patients. In patients classified as having pT3N0 cancer with no or 1 risk factor, the 5-year recurrence rates were 9% and 11%. Risk factors for shorter time to recurrence were male sex, more advanced pT and pN classification, vascular and perineural invasion, emergency surgery, lack of central ligature, short longitudinal resection margin, postoperative complications, and, in stage III, no adjuvant chemotherapy. LIMITATIONS The registry does not contain some recently identified factors of relevance for recurrence rates, and some late recurrences may be missing. CONCLUSIONS The recurrence rate is less than that previously observed in historical materials, but current, commonly used risk factors are still useful in evaluating recurrence risks. Stratification by pT and pN classification and the number of risk factors enables the identification of large patient groups characterized by such a low recurrence rate that it is questionable whether adjuvant treatment is motivated. See Video Abstract at http://links.lww.com/DCR/A663.
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Bernhoff R, Sjövall A, Buchli C, Granath F, Holm T, Martling A. Complete mesocolic excision in right-sided colon cancer does not increase severe short-term postoperative adverse events. Colorectal Dis 2018; 20:383-389. [PMID: 29091337 DOI: 10.1111/codi.13950] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 10/16/2017] [Indexed: 02/08/2023]
Abstract
AIM The aim was to assess whether complete mesocolic excision (CME) in patients with right-sided colon cancer is related to short-term mortality or postoperative adverse events requiring reoperation. The complete mobilization of an integral mesocolon and central ligation of blood vessels are essential steps in CME surgery. The resultant specimen, with an intact mesocolic fascia and a high number of harvested lymph nodes, is believed to be oncologically favourable. However, it has been suggested that CME surgery may increase the risk of intra-operative severe adverse events, due to exposure of vital retroperitoneal organs and large blood vessels. METHOD In a population-based, nested case-control study, all residents in the Stockholm County operated for right-sided colon cancer from 2004 until 2012 were identified from the Swedish Colorectal Cancer Registry. Patients who died within 90 days after surgery or were reoperated within 30 days after surgery, or during the index hospital stay, were defined as cases. Two controls per case were randomly sampled and individually matched for age, sex, TNM stage and emergency vs elective surgery. Exposure status (CME surgery) was assessed from original surgical reports. RESULTS The estimated proportion of CME surgery was 14.8% (35 of 236) for cases and 19.5% (92 of 473) for controls. The unadjusted OR for short-term mortality or reoperation after CME surgery was 0.72 (95% CI: 0.47-1.10; P = 0.15). The ORs were lower in the late part of the study (0.51; 95% CI: 0.26-1.01) and in high volume hospitals (0.61, 95% CI: 0.35-1.06). CONCLUSIONS The present study does not indicate that CME surgery is associated with an increased risk of severe adverse events such as 90-day mortality or reoperation.
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Affiliation(s)
- R Bernhoff
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Surgery, Capio Saint Göran Hospital, Stockholm, Sweden
| | - A Sjövall
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Centre of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - C Buchli
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Centre of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - F Granath
- Unit of Clinical Epidemiology, Department of Medicine, Karolinska Institutet, Stockholm, Sweden
| | - T Holm
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Centre of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - A Martling
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Centre of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
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Tudyka V, Madoff R, Wale A, Laurberg S, Yano H, Brown G. Session 1: Colon cancer - 10 years behind the rectum. Colorectal Dis 2018; 20 Suppl 1:28-33. [PMID: 29878679 DOI: 10.1111/codi.14074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The improvements in surgical technique brought about by the widespread adoption of total mesorectal excision plane dissection in rectal cancer has substantially improved survival and recurrence rates from this disease. For the first time in 50 years, the outcomes in rectal cancer have overtaken those of colon cancer. Professor Madoff's overview lecture and the experts' round table discussion address whether applying the surgical principles already achieved in rectal cancer can meet with similar success in colon cancer, how this can be achieved and the challenges we face.
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Affiliation(s)
- V Tudyka
- Royal Marsden NHS Foundation Trust, London, UK
| | - R Madoff
- Division of Colon and Rectal Surgery, University of Minnesota, Minneapolis, Minnesota, USA
| | - A Wale
- Royal Marsden NHS Foundation Trust, London, UK
| | - S Laurberg
- Aarhus University Hospital, Aarhus, Denmark
| | - H Yano
- Department of Surgery, Division of Colorectal Surgery, National Center for Global Health and Medicine, Tokyo, Japan
| | - G Brown
- Royal Marsden NHS Foundation Trust, London, UK.,Imperial College London, London, UK
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Shin JK, Kim HC, Lee WY, Yun SH, Cho YB, Huh JW, Park YA, Chun HK. Laparoscopic modified mesocolic excision with central vascular ligation in right-sided colon cancer shows better short- and long-term outcomes compared with the open approach in propensity score analysis. Surg Endosc 2017; 32:2721-2731. [PMID: 29101572 PMCID: PMC5956070 DOI: 10.1007/s00464-017-5970-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 10/25/2017] [Indexed: 02/06/2023]
Abstract
Background The introduction of complete mesocolic excision (CME) with central vessel ligation (CVL) for right-sided colon cancer has improved oncologic outcomes. However, there is controversy over the oncologic safety of laparoscopic CME with CVL. This study compared short-term and long-term oncologic outcomes between laparoscopic and open modified CME (mCME) with CVL in patients with right-sided colon cancer. Methods We enrolled 1239 patients who underwent open mCME with CVL and 1010 patients treated by a laparoscopic approach for right-side colon cancer between 2000 and 2013 and used 1:1 propensity score matching to adjust for potential baseline confounders between two groups. Results After propensity score matching, 683 patients who underwent open mCME with CVL were compared with 683 patients treated with a laparoscopic approach. There were no significant differences between these groups in age, sex, ASA score, TNM stage, tumor size, lymphovascular invasion, and perineural invasion. Comparison of open and laparoscopic mCME groups showed no significant difference in postoperative morbidity (21.4 vs. 18.3%, p = 0.175) and mortality (0.1 vs. 0%, p = 1.000). The laparoscopic mCME group showed shorter length of hospital stay. The 5-year overall survival rate was 83.7% in the open group and 94.7% in the laparoscopic group (p < 0.001). The laparoscopic group also showed a significantly better 5-year disease-free survival rate (82.7 vs. 88.7%, p = 0.009) and 5-year disease-specific survival rate (83.7 vs. 94.7%, p < 0.001). Conclusion Laparoscopic modified mesocolic excision with central vascular ligation is a safe and feasible approach with better short-term recovery profiles and potential oncologic benefits than the open approach for right-sided colon cancer.
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Affiliation(s)
- Jung Kyong Shin
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Hee Cheol Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea.
| | - Woo Yong Lee
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Seong Hyeon Yun
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Yong Beom Cho
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Jung Wook Huh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Yoon Ah Park
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Ho-Kyung Chun
- Department of Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, South Korea
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Wang C, Gao Z, Shen K, Shen Z, Jiang K, Liang B, Yin M, Yang X, Wang S, Ye Y. Safety, quality and effect of complete mesocolic excision vs non-complete mesocolic excision in patients with colon cancer: a systemic review and meta-analysis. Colorectal Dis 2017; 19:962-972. [PMID: 28949060 DOI: 10.1111/codi.13900] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 08/14/2017] [Indexed: 12/11/2022]
Abstract
AIM The application of complete mesocolic excision (CME) in colon cancer is controversial. We performed a meta-analysis to compare the safety, quality and effect of CME with non-complete mesocolic excision (NCME) in patients with colon cancer. METHOD We searched PubMed, ScienceDirect, the Cochrane Library and Scopus to identify studies comparing CME with NCME in colon cancer. We focused on three study outcome areas: safety (operation time, blood loss, complications, mortality); quality (large bowel length, distance from the tumour to the high vascular tie, area of mesentery, total lymph nodes); and effect (long-term survival). RESULTS A total of 8586 patients from 12 studies were included in the meta-analysis. CME was associated with greater intra-operative blood loss [weighted mean difference (WMD) 79.87, 95% CI: 65.88-93.86], more postoperative surgical complications (relative risk 1.23, 95% CI: 1.08-1.40), longer large bowel resection (WMD 47.06, 95% CI: 10.49-83.62), greater distance from the tumour to the high vascular tie (WMD 17.51, 95% CI: 15.16-19.87), larger area of mesentery (WMD 36.09, 95% CI: 18.06-54.13) and more lymph nodes (WMD 6.13, 95% CI: 1.97-10.28) than NCME. CME also had positive effects on 5-year survival [hazard ratio (HR) 0.33, 95% CI: 0.13-0.81], 3-year survival (HR 0.58, 95% CI: 0.39-0.86) and 3-year survival for Stage III disease (HR 0.69, 95% CI: 0.60-0.80) compared with NCME. CONCLUSION Limited evidence suggests that CME is a more effective strategy for improving specimen quality and survival but with a higher complication rate.
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Affiliation(s)
- C Wang
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - Z Gao
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, China
| | - K Shen
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - Z Shen
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - K Jiang
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - B Liang
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - M Yin
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - X Yang
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - S Wang
- Laboratory of Surgical Oncology, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
| | - Y Ye
- Department of Gastrointestinal Surgery, Peking University People's Hospital, Beijing, China
- Beijing Key Laboratory of Colorectal Cancer Diagnosis and Treatment Research, Beijing, China
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30
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Mori S, Kita Y, Baba K, Yanagi M, Tanabe K, Uchikado Y, Kurahara H, Arigami T, Uenosono Y, Mataki Y, Nakajo A, Maemura K, Natsugoe S. Laparoscopic complete mesocolic excision via mesofascial separation for left-sided colon cancer. Surg Today 2017; 48:274-281. [PMID: 28836166 DOI: 10.1007/s00595-017-1580-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 08/01/2017] [Indexed: 01/01/2023]
Abstract
PURPOSE To evaluate the safety and feasibility of laparoscopic complete mesocolic excision (CME) via mesofascial separation for left-sided colon cancer. METHODS We evaluated prospectively collected data on 65 consecutive patients with stage I-III left-sided colon cancer, who underwent laparoscopic CME between October 2011 and September 2016. After the exclusion of 5 patients who had T4b or other active tumors, 60 patients were the subjects of this analysis. The completeness of CME, preservation of the hypogastric nerve, operative data, pathological findings, complications, and length of hospital stay were assessed. RESULTS CME completeness was graded as the mesocolic and intramesocolic plane in 54 and 6 patients, respectively. The hypogastric nerve was preserved in all patients. A total of 17, 12, 28, and 3 patients had T1, T2, T3, and T4a tumors, respectively. The mean number of lymph nodes retrieved was 16.2, and lymph node metastasis was identified in 22 patients. The mean operative time and intraoperative blood loss were 283 min and 38 ml, respectively. One patient had an intraoperative complication and six patients had postoperative complications. The hospital stay was 12 days. CONCLUSION Laparoscopic CME via mesofascial separation is a safe and feasible procedure for left-sided colon cancer.
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Affiliation(s)
- Shinichiro Mori
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan.
| | - Yoshiaki Kita
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Kenji Baba
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Masayuki Yanagi
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Kan Tanabe
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Yasuto Uchikado
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Hiroshi Kurahara
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Takaaki Arigami
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Yoshikazu Uenosono
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Yuko Mataki
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Akihiro Nakajo
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Kosei Maemura
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
| | - Shoji Natsugoe
- Department of Digestive Surgery, Breast and Thyroid Surgery, Graduate School of Medicine, Kagoshima University, Sakuragaoka 8-35-1, Kagoshima, 890-8520, Japan
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31
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Paquette IM, Madoff RD, Sigurdson ER, Chang GJ. Impact of Proximal Vascular Ligation on Survival of Patients with Colon Cancer. Ann Surg Oncol 2016; 25:38-45. [PMID: 27942902 DOI: 10.1245/s10434-016-5720-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Indexed: 12/29/2022]
Abstract
In an effort to optimize further the surgical management of colon cancer, many groups have advocated extended lymphadenectomy as a strategy to improve completeness of resection and lymph node harvest. This review evaluates lymphadenectomy according to the definitions for extent of lymph node dissection based on the guidelines provided by the Japanese Society of Cancer of the Colon and Rectum and the contemporary concepts of complete mesocolic excision and central vascular ligation. The proposed benefits of a D3 or central nodal dissection along root vessels in colon cancer is improving accuracy of lymph node evaluation and ensuring complete removal of lymph nodes that may harbor undetected tumor cells or other undefined immunologic processes important for metastases. Metastasis to central lymph nodes occurs in 1 to 8% of patients with colon cancer and is most commonly seen in T3 and T4 tumors. Although central lymph node metastasis is associated with decreased survival after resection, resection of the nodes, when present, may confer a survival benefit analogous to resection of metastasis at distant sites. Current data support a standardized anatomic approach to colonic resection with complete resection of the mesocolic envelope and ligation at least to the D2 level.
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Affiliation(s)
- Ian M Paquette
- Division of Colon and Rectal Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA.
| | - Robert D Madoff
- Division of Colon and Rectal Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Elin R Sigurdson
- Division of Colon and Rectal Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - George J Chang
- Division of Colon and Rectal Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, USA
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32
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Spinoglio G, Marano A, Bianchi PP, Priora F, Lenti LM, Ravazzoni F, Formisano G. Robotic Right Colectomy with Modified Complete Mesocolic Excision: Long-Term Oncologic Outcomes. Ann Surg Oncol 2016; 23:684-691. [DOI: 10.1245/s10434-016-5580-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Indexed: 12/20/2022]
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33
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Holm T, Martling A. Errors in data interpretation and terminology must not deter us from meticulous, high quality colorectal cancer surgery. Colorectal Dis 2016; 18:743-4. [PMID: 27481717 DOI: 10.1111/codi.13367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Torbjörn Holm
- Division of Coloproctology, Center of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Anna Martling
- Division of Coloproctology, Center of Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
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34
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Lubowski DZ. Reporting postoperative morbidity and mortality by hospital and surgeon: a new era in accountability. ANZ J Surg 2016; 86:429-30. [DOI: 10.1111/ans.13544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 02/22/2016] [Indexed: 11/28/2022]
Affiliation(s)
- David Z. Lubowski
- Department of Colorectal Surgery; St George Hospital; Sydney New South Wales Australia
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