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Abstract
BACKGROUND Adequate oncologic staging of rectal neoplasia is important for treatment and prognostic evaluation of the disease. Diagnostic methods such as endorectal ultrasound can assess rectal wall invasion and lymph node involvement. OBJECTIVE The purpose of this study was to correlate findings of 3-dimensional endorectal ultrasound and pathologic diagnosis of extraperitoneal rectal tumors with regard to depth of rectal wall invasion, lymph node involvement, percentage of rectal circumference involvement, and tumor extension. DESIGN Consecutive patients with extraperitoneal rectal tumors were prospectively assessed by 3-dimensional endorectal ultrasound blind to other staging methods and pathologic diagnosis. PATIENTS Patients who underwent endorectal ultrasound followed by surgery were included in the study. SETTINGS The study was conducted at a single academic institution. MAIN OUTCOME MEASURES Sensitivity, specificity, positive and negative predictive values, area under curve, and κ coefficient between 3-dimensional endorectal ultrasound and pathologic diagnosis were determined. Intraclass correlation coefficient was calculated for tumor extension and percentage of rectal wall involvement. RESULTS Forty-four patients (27 women; mean age = 63.5 years) were evaluated between September 2010 and June 2014. Most lesions were malignant (72.7%). For depth of submucosal invasion, 3-dimensional endorectal ultrasound showed sensitivity of 77.3%, specificity of 86.4%, positive predictive value of 85.0%, a negative predictive value of 79.2%, and an area under curve of 0.82. The weighted κ coefficient for depth of rectal wall invasion staging was 0.67, and there was no agreement between 3-dimensional endorectal ultrasound and pathologic diagnosis for lymph node involvement (κ = -0.164). Intraclass correlation coefficient for lesion extension and percentage of rectal circumference involvement were 0.45 and 0.66. A better correlation between 3-dimensional endorectal ultrasound and pathologic diagnosis was observed in tumors <5 cm and with <50% of rectal wall involvement. LIMITATIONS The relatively small sample size of patients with early rectal lesions referred directly for surgery could represent a potential selection bias. CONCLUSIONS Three-dimensional endorectal ultrasound was effective for determining rectal wall invasion and lesion extension in tumors <5 cm and with <50% of rectal wall invasion but was limited for detecting lymph node involvement in early rectal lesions.
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Diagnostic Accuracy of MRI for Assessment of T Category and Circumferential Resection Margin Involvement in Patients With Rectal Cancer: A Meta-Analysis. Dis Colon Rectum 2016; 59:789-99. [PMID: 27384098 DOI: 10.1097/dcr.0000000000000611] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND The prognosis of rectal cancer is directly related to the stage of the tumor at diagnosis. Accurate preoperative staging is essential for selecting patients to receive optimal treatment. OBJECTIVE The purpose of this study was to evaluate the diagnostic performance of MRI in tumor staging and circumferential resection margin involvement in rectal cancer. DATA SOURCES A systematic literature search was performed in MEDLINE, EMBASE, PubMed, Cochrane Database of Systematic Reviews, and Web of Science database. STUDY SELECTION Original articles from 2000 to 2016 on the diagnostic performance of MRI in the staging of rectal cancer and/or assessment of mesorectal fascia status were eligible. MAIN OUTCOME MEASURES Pooled diagnostic statistics including sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio were calculated for invasion of muscularis propria, perirectal tissue, and adjacent organs and for circumferential resection margin involvement through bivariate random-effects modeling. Summary receiver operating characteristic curves were fitted, and areas under summary receiver operating characteristic curves were counted to evaluate the diagnostic performance of MRI for each outcome. RESULTS Thirty-five studies were eligible for this meta-analysis. Preoperative MRI revealed the highest sensitivity of 0.97 (95% CI, 0.96-0.98) and specificity of 0.97 (95% CI, 0.96-0.98) for muscularis propria invasion and adjacent organ invasion. Areas under summary receiver operating characteristic curves indicated good diagnostic accuracy for each outcome, with the highest of 0.9515 for the assessment of adjacent organ invasion. Significant heterogeneity existed among studies. There was no notable publication bias for each outcome. LIMITATIONS This meta-analysis revealed relatively high diagnostic accuracy for preoperative MRI, although significant heterogeneity existed. Therefore, exploration should be focused on standardized interpretation criteria and optimal MRI protocols for future studies. CONCLUSIONS MRI showed relatively high diagnostic accuracy for preoperative T staging and circumferential resection margin assessment and should be reliable for clinical decision making.
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Orsini RG, Wiggers T, DeRuiter MC, Quirke P, Beets-Tan RG, van de Velde CJ, Rutten HJT. The modern anatomical surgical approach to localised rectal cancer. EJC Suppl 2015. [PMID: 26217114 PMCID: PMC4041398 DOI: 10.1016/j.ejcsup.2013.07.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- R G Orsini
- Catharina Hospital, Eindhoven, The Netherlands
| | - T Wiggers
- University Medical Centre Groningen, Groningen, The Netherlands
| | - M C DeRuiter
- Leiden University Medical Centre, Leiden, The Netherlands
| | - P Quirke
- Leeds Institute of Molecular Medicine, University of Leeds, Leeds, UK
| | - R G Beets-Tan
- GROW School for Oncology & Developmental Biology, Department of Radiology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | | | - H J T Rutten
- Catharina Hospital, Eindhoven, The Netherlands ; GROW School for Oncology & Developmental Biology, Department of Surgery, Maastricht University Medical Centre, Maastricht, The Netherlands
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Vignali A, Nardi PD. Multidisciplinary treatment of rectal cancer in 2014: Where are we going? World J Gastroenterol 2014; 20:11249-11261. [PMID: 25170209 PMCID: PMC4145763 DOI: 10.3748/wjg.v20.i32.11249] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 05/08/2014] [Accepted: 05/26/2014] [Indexed: 02/06/2023] Open
Abstract
In the present review we discuss the recent developments and future directions in the multimodal treatment of locally advanced rectal cancer, with respect to staging and re-staging modalities, to the current role of neoadjuvant chemo-radiation and to the conservative and more limited surgical approaches based on tumour response after neoadjuvant combined therapy. When initial tumor staging is considered a high accuracy has been reported for T pre-treatment staging, while preoperative lymph node mapping is still suboptimal. With respect to tumour re-staging, all the current available modalities still present a limited accuracy, in particular in defining a complete response. The role of short vs long-course radiotherapy regimens as well as the optimal time of surgery are still unclear and under investigation by means of ongoing randomized trials. Observational management or local excision following tumour complete response are promising alternatives to total mesorectal excision, but need further evaluation, and their use outside of a clinical trial is not recommended. The preoperative selection of patients who will benefit from neoadjuvant radiotherapy or not, as well as the proper identification of a clinical complete tumour response after combined treatment modalities,will influence the future directions in the treatment of locally advanced rectal cancer.
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Aljebreen AM, Azzam NA, Alzubaidi AM, Alsharqawi MS, Altraiki TA, Alharbi OR, Almadi MA. The accuracy of multi-detector row computerized tomography in staging rectal cancer compared to endoscopic ultrasound. Saudi J Gastroenterol 2013; 19:108-12. [PMID: 23680707 PMCID: PMC3709372 DOI: 10.4103/1319-3767.111950] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND/AIM Our aim was to evaluate the diagnostic accuracy of multi-detector row computerized tomography (MDCT) in staging of rectal cancer by comparing it to rectal endoscopic ultrasound (EUS). MATERIALS AND METHODS We prospectively included all patients with rectal cancer referred to our gastroenterology unit for staging of rectal cancer from December 2007 until February 2011, 53 patients whose biopsy had proven rectal cancer underwent both MDCT scan of the pelvis and rectal EUS. Both imaging modalities were compared and the agreement between T- and N-staging of the disease was assessed. RESULTS We staged 62 patients with rectal cancer during the study period. Of these, 53 patients met the inclusion criteria and were evaluated (25 women and 28 men). The mean age was 57.79 ± 14.99 years (range 21-87). MDCT had poor accuracy compared with EUS in T-staging with a low degree of agreement (kappa = 0.26), while for N-staging MDCT had a better accuracy and a moderate degree of agreement with EUS (kappa = 0.45). CONCLUSIONS MDCT has a poor accuracy for predicting tumor invasion compared to EUS for T-staging while it has moderate accuracy for N-staging.
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Affiliation(s)
- Abdulrahman M. Aljebreen
- Division of Gastroenterology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Nahla A. Azzam
- Division of Gastroenterology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Ahmad M. Alzubaidi
- Division of Colorectal Surgery, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed S. Alsharqawi
- Division of Radiology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Thamer A. Altraiki
- Division of Colorectal Surgery, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Othman R. Alharbi
- Division of Gastroenterology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia
| | - Majid A. Almadi
- Division of Gastroenterology, King Khalid University Hospital, King Saud University, Riyadh, Saudi Arabia,The McGill University Health Center, Montreal General Hospital, McGill University, Montreal, Canada,Address for correspondence: Dr. Majid A. Almadi, Division of Gastroenterology, King Khalid University Hospital, King Saud University, P.O. Box 2925 (59), Riyadh 11461, Saudi Arabia. E-mail:
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Accuracy of endorectal ultrasound for measurement of the closest predicted radial mesorectal margin for rectal cancer. Dis Colon Rectum 2012; 55:59-64. [PMID: 22156868 DOI: 10.1097/dcr.0b013e318235b885] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND At present, pelvic phased array-coil MR is used as the validated imaging modality for measurement of the closest predicted radial mesorectal margin for rectal cancer. Endorectal ultrasound is also used to assess the clinical stage of the cancer that will determine the recommendation for neoadjuvant chemoradiation, but it has not been used to assess the closest predicted radial margin. OBJECTIVE We propose to assess endorectal ultrasound identification of mesorectal margins and the measurement of the closest predicted radial tumor-mesorectal margin. PATIENTS AND METHODS Patients included were those having MRI and endorectal ultrasound for evaluation of primary rectal cancer in 2010 at a tertiary cancer referral colorectal clinic. Clinical data, MRI, and endorectal ultrasound images were assessed. Two independent retrospective measurements of mesorectal dimensions were correlated to evaluate the reproducibility of identifying mesorectal margins. MRI and endorectal ultrasound images were compared for independent measurements of mesorectal dimensions and of the closest predicted radial mesorectal margin. MRI and endorectal ultrasound determination of margin involvement were assessed for agreement. RESULTS Fifty-two patients were studied with an average rectal cancer distance to the anal verge of 6.8 cm. Interobserver correlation coefficients of endorectal ultrasound mesorectal dimensions ranged from 0.47 to 0.53 (p < 0.01). MR and endorectal ultrasound measurements of the closest predicted radial mesorectal margin were correlated r = 0.56 (p < 0.0001). MR and endorectal ultrasound determination of margin involvement agreed in 81% of cases. CONCLUSION Endorectal ultrasound has substantial agreement with MR to measure the closest predicted radial tumor-mesorectal margin. Correlations between observers and modalities for identification of mesorectal dimensions are modest. Further assessment is indicated to confirm endorectal ultrasound mesorectal measurements in a larger sample and to understand the advantages and disadvantages relative to MR.
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Reproducibility of Depth of Extramural Tumor Spread and Distance to Circumferential Resection Margin at Rectal MRI: Enhancement of Clinical Guidelines for Neoadjuvant Therapy. AJR Am J Roentgenol 2011; 197:1360-6. [DOI: 10.2214/ajr.11.6508] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Fernández-Esparrach G, Ayuso-Colella JR, Sendino O, Pagés M, Cuatrecasas M, Pellisé M, Maurel J, Ayuso-Colella C, González-Suárez B, Llach J, Castells A, Ginès A. EUS and magnetic resonance imaging in the staging of rectal cancer: a prospective and comparative study. Gastrointest Endosc 2011; 74:347-54. [PMID: 21802588 DOI: 10.1016/j.gie.2011.03.1257] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 03/30/2011] [Indexed: 02/06/2023]
Abstract
BACKGROUND Accurate locoregional staging is crucial in rectal cancer for deciding patient management because the administration of neoadjuvant therapy depends on it. EUS and magnetic resonance imaging (MRI) are used indistinctly in the pretherapeutic workup of rectal cancer. OBJECTIVE To prospectively compare the performance of EUS and MRI in the locoregional staging of rectal cancer in a large series of patients. DESIGN Prospective and comparative study. SETTING Tertiary center. PATIENTS Patients with histologically proven rectal cancer. INTERVENTIONS EUS and MRI were performed in all patients by a different operator unaware of the results of the other procedure. MAIN OUTCOME MEASUREMENTS Epidemiological, clinical, radiological, and echographic variables were evaluated. Pathological examination of the surgical specimen was used as the criterion standard. RESULTS Ninety patients (54 men and 36 women with a mean age of 68 ± 12 years; range 33-87 years) constitute the final sample of this study. Most of the tumors were stages T2-T3 (85%; 95% CI, 77%-92%). Twenty of them (22%; 95% CI, 14%-32%) were stenotic and 24 (27%; 95% CI, 18%-37%) had polypoid morphology. The accuracy of T staging was very similar for EUS and MRI for stage T2 (76%; 95% CI, 65%-84% and 77%; 95% CI, 67%-85%, respectively; P = not significant) and stage T3 (76%; 95% CI, 65%-84% and 83%, 95% CI, 73%-90%, respectively; P = not significant). MRI was not able to visualize any T1 tumor, whereas EUS understaged all T4 tumors. The univariate analysis showed that the polypoid morphology of the tumor inversely correlated with T staging on MRI. The accuracy of MRI for N staging was higher than that of EUS, although the difference did not reach statistical significance (79%; 95% CI, 65%-88% and 65%; 95% CI, 51%-78%, respectively). When performing the univariate analysis to assess the reasons for this difference, the presence of a stenotic tumor was the only parameter significantly related to a poorer performance of EUS in N staging. LIMITATIONS The small number of early and locally advanced lesions. CONCLUSIONS EUS and MRI have similar accuracy in the T and N staging in rectal cancer. The presence of stenosis and polypoid morphology is inversely associated with accuracy for either EUS or MRI.
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Affiliation(s)
- Glòria Fernández-Esparrach
- Department of Gastroenterology, Institut de Malalties Digestives i Metabòliques, IDIBAPS, CIBERehd, Hospital Clínic, University of Barcelona, Barcelona, Spain
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9
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Pedersen BG, Blomqvist L, Brown G, Fenger-Grøn M, Moran B, Laurberg S. Postgraduate multidisciplinary development program: impact on the interpretation of pelvic MRI in patients with rectal cancer: a clinical audit in West Denmark. Dis Colon Rectum 2011; 54:328-34. [PMID: 21304305 DOI: 10.1007/dcr.0b013e3182031e83] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Pelvic MRI in patients with rectal cancer is an accepted tool for the identification of patients with poor prognostic tumors who may benefit from neoadjuvant therapy. In Denmark, this examination has been mandatory in the workup on rectal cancer since 2002. OBJECTIVE This study aimed to assess the impact of a multidisciplinary team course for doctors in West Denmark on the technical quality, reporting, and interpretation of pelvic MRI in rectal cancer. DESIGN This study is interventional and observational. Two expert reviewers served as reference standard in the evaluation of consecutively performed pelvic MRI scans against which the evaluations from the participating centers were compared. SETTINGS Five imaging centers in West Denmark performed pelvic MRI in rectal cancer from March 1 to December 31, 2007. PATIENTS One hundred and eighty patients with newly diagnosed rectal cancer were enrolled. INTERVENTIONS This study involved a multidisciplinary team course including on-site visits. MAIN OUTCOME MEASURES The MR scans were evaluated concerning technical performance, reporting, interpretation, and the ability to correctly allocate patients to chemoirradiation based on imaging findings pre- and postcourse. RESULTS Eighteen percent of the scans were of satisfying technical quality for staging rectal cancer before the course compared with 74% after (P < .001). After the course, the T-stage subclassification, the depth of extramural spread, the N stage, and the presence of extramural vascular invasion was reported significantly more frequently. Based on imaging findings, we observed no significant effect on the ability to perform correct treatment stratification according to Danish guidelines. LIMITATIONS The evaluation process itself may have improved the performance of the participating centers. CONCLUSIONS Performance and reporting of pelvic MRI in patients with rectal cancer can be improved significantly through multidisciplinary development courses and on-site visits, whereas improvements in image interpretation with regard to treatment stratification may demand more intensive efforts.
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Affiliation(s)
- B Ginnerup Pedersen
- Department of Radiology, MR Research Centre, Aarhus University Hospital, Skejby, Denmark.
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Chapuis PH, Chan C, Dent OF. Clinicopathological staging of colorectal cancer: Evolution and consensus-an Australian perspective. J Gastroenterol Hepatol 2011; 26 Suppl 1:58-64. [PMID: 21199515 DOI: 10.1111/j.1440-1746.2010.06538.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In 1991 this journal published the report of an international working party to the World Congress of Gastroenterology regarding the clinicopathological staging of colorectal cancer. Since that time staging has continued to evolve as further prognostic factors in colorectal cancer have been elucidated in studies of increasingly large databases in several countries. This review summarizes several of the key issues that have arisen during this evolutionary process and raises matters which still remain controversial in staging at the present time.
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Affiliation(s)
- Pierre H Chapuis
- Department of Colorectal Surgery, Concord Hospital and Discipline of Surgery, The University of Sydney, New South Wales, Australia
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11
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Magnetic resonance imaging (MRI) in rectal cancer: a comprehensive review. Insights Imaging 2010; 1:245-267. [PMID: 22347920 PMCID: PMC3259411 DOI: 10.1007/s13244-010-0037-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Revised: 07/11/2010] [Accepted: 07/26/2010] [Indexed: 02/07/2023] Open
Abstract
Magnetic resonance imaging (MRI) has established itself as the primary method for local staging in patients with rectal cancer. This is due to several factors, most importantly because of the ability to assess the status of circumferential resection margin. There are several newer developments being introduced continuously, such as diffusion-weighted imaging and imaging with 3 T. Assessment of loco-regional lymph nodes has also been investigated extensively using different approaches, but more work needs to be done. Finally, evaluation of tumours during or after preoperative treatment is becoming an everyday reality. All these new aspects prompt a review of the most recent advances and opinions. In this review, a comprehensive overview of the current status of MRI in the loco-regional assessment and management of rectal cancer is presented. The findings on MRI and their accuracy are reviewed based on the most up-to-date evidence. Optimisation of MRI acquisition and relevant regional anatomy are also presented, based on published literature and our own experience.
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Kube R, Ptok H, Jacob D, Fahlke J, Mroczkowski P, Lippert H, Ziegenhardt G, Schmidt U, Gastinger I. Modified neoadjuvant short-course radiation therapy in uT3 rectal carcinoma: low local recurrence rate with unchanged overall survival and frequent morbidity. Int J Colorectal Dis 2010; 25:109-17. [PMID: 19876634 DOI: 10.1007/s00384-009-0823-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/09/2009] [Indexed: 02/04/2023]
Abstract
PURPOSE The purpose of this study is to investigate the value of a modified neoadjuvant short-course radiation therapy (SCRT) in uT3 rectal carcinoma, which, despite local R0 resectability, carries a greater risk of local recurrence than less invasive carcinomas. METHODS Sixty-three patients with uT3 rectal carcinoma < or =10 cm above the anal verge received a modified 8 x 3 Gy pre-operative SCRT. Radiation-associated and peri-operative complications were recorded, and the patients were followed up for long-term oncological outcome and morbidity. RESULTS In the study group, there were no severe adverse radiation-associated effects; the rate of peri-operative morbidity was 54.0% and that of in-hospital mortality is 4.8%. The probability (Kaplan-Meier estimate) of local recurrence was 3.9% with a probability of metachronic distant metastases of 26.8% (5-year rates). We found the probability of 5-year disease-free survival to be 70.5% and that of 5-year overall survival, 59.5%. Long-term complications were reported for 31.7% of patients. CONCLUSIONS Compared to the literature-modified 8 x 3 Gy neoadjuvant SCRT and surgery in uT3, rectal carcinoma was associated with low local recurrence but frequent peri-operative complications. The decisive prognostic factor, distant metastasis, was unaffected. Difficulties included overestimation of tumour invasion depth by endosonography. Possible clinical consequences of the results are discussed.
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Affiliation(s)
- Rainer Kube
- An-Institut für Qualitätssicherung in der operativen Medizin an der Otto-von-Guericke Universität Magdeburg, Germany.
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McMahon CJ, Smith MP. Magnetic resonance imaging in locoregional staging of rectal adenocarcinoma. Semin Ultrasound CT MR 2009; 29:433-53. [PMID: 19166041 DOI: 10.1053/j.sult.2008.10.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A comprehensive overview of the current status of magnetic resonance imaging (MRI) in the locoregional assessment and management of rectal adenocarcinoma is presented. Staging systems for rectal cancer and treatment strategies in its management are discussed to give the reader the context that shapes MRI acquisition techniques and interpretation. Findings on MRI are detailed and their accuracy reviewed based on currently available evidence. Optimization of MRI acquisition and relevant pelvic anatomy are reviewed. A detailed description of our approach in interpreting MRI for locoregional staging of rectal cancer is given and future directions are also introduced.
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Affiliation(s)
- Colm J McMahon
- Department of Radiology, Beth israel Deaconess Medical Center, Boston, MA 02215, USA
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Strassburg J, Junginger T, Trinh T, Püttcher O, Oberholzer K, Heald RJ, Hermanek P. Magnetic resonance imaging (MRI)-based indication for neoadjuvant treatment of rectal carcinoma and the surrogate endpoint CRM status. Int J Colorectal Dis 2008; 23:1099-107. [PMID: 18633624 DOI: 10.1007/s00384-008-0531-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/26/2008] [Indexed: 02/04/2023]
Abstract
AIM Is it possible to reduce the frequency of neoadjuvant therapy for rectal carcinoma and nevertheless achieve a rate of more than 90% circumferential resection margin (CRM)-negative resection specimens by a novel concept of magnetic resonance imaging (MRI)-based therapy planning? MATERIALS AND METHODS One hundred eighty-one patients from Berlin and Mainz, Germany, with primary rectal carcinoma, without distant metastasis, underwent radical surgery with curative intention. Surgical procedures applied were anterior resection with total mesorectal excision (TME) or partial mesorectal excision (PME; PME for tumours of the upper rectum) or abdominoperineal excision with TME. RESULTS With MRI selection of the highest-risk cases, neoadjuvant therapy was given to only 62 of 181 (34.3%). The rate of CRM-negative resection specimens on histology was 170 of 181 (93.9%) for all patients, and in Berlin, only 1 of 93 (1%) specimens was CRM-positive. Patients selected for primary surgery had CRM-negative specimens on histology in 114 of 119 (95.8%). Those selected for neoadjuvant therapy had a lower rate of clear margin: 56 of 62 (90%). CONCLUSION By applying a MRI-based indication, the frequency of neoadjuvant treatment with its acute and late adverse effects can be reduced to 30-35% without reduction of pathologically CRM-negative resection specimens and, thus, without the danger of worsening the oncological long-term results. This concept should be confirmed in prospective multicentre observation studies with quality assurance of MRI, surgery and pathology.
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Affiliation(s)
- Joachim Strassburg
- Department of General and Visceral Surgery, Vivantes Klinikum im Friedrichshain, Berlin, Germany
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Rovera F, Dionigi G, Boni L, Cutaia S, Diurni M, Dionigi R. The role of EUS and MRI in rectal cancer staging. Surg Oncol 2007; 16 Suppl 1:S51-2. [PMID: 18032030 DOI: 10.1016/j.suronc.2007.10.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Rectal cancer continues to be one of the most common tumors worldwide. Its prognosis mainly depends on early diagnosis and precise stage evaluation in order to choose the most effective treatment. In recent years, new and promising technologies have been proposed and are now available in daily practice. Each rectal cancer patient should be considered individually, choosing the diagnostic pretreatment exams that are appropriate for that single clinical case mainly related to the tumor and the available instruments. Clinicians must be informed about the efficacy of these technologies and be aware of any cause of mistake in tumor staging in order to reduce the risk of both improper use and inaccurate staging.
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Affiliation(s)
- F Rovera
- Department of Surgical Sciences, University of Insubria, 21100 Varese, Italy.
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Rovera F, Dionigi G, Iosca S, Carrafiello G, Recaldini C, Boni L, Carcano G, Diurni M, Dionigi R. Preoperative assessment of rectal cancer stage: state of the art. Expert Rev Med Devices 2007; 4:517-22. [PMID: 17605687 DOI: 10.1586/17434440.4.4.517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Rectal cancer is one of the most common tumors worldwide; it accounts for approximately 25-30% of cancers arising in the large bowel. Owing to greater distribution of screening programs and better attention from both patients and General Practitioners to this disease, in recent years we have observed an increasing number of cases diagnosed in the early stages, with a consequent better prognosis. The improved 5-year survival is also partially due to better, and more accurate, diagnostic techniques and to more curative treatments. In this review, the authors analyze and discuss the more recent diagnostic techniques for an accurate preoperative staging of rectal cancer, highlighting each method's advantages and limits for their routine use in clinical practice.
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Affiliation(s)
- Francesca Rovera
- Clinical Lecturer, Department of Surgical Sciences, University of Insubria, Azienda Ospedaliero-Universitaria, Fondazione Macchi, Viale Borri 57, 21100 Varese, Italy.
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