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Qi Y, Guo X, Li Z, Ren B, Wang Z. Distinguishing optimal candidates for primary tumor resection in patients with metastatic lung adenocarcinoma: A predictive model based on propensity score matching. Heliyon 2024; 10:e27768. [PMID: 38690000 PMCID: PMC11059407 DOI: 10.1016/j.heliyon.2024.e27768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 05/02/2024] Open
Abstract
Background Primary tumor resection is associated with survival benefits in patients with metastatic lung adenocarcinoma (mLUAD). However, there are no established methods to determine which individuals would benefit from surgery. Therefore, we developed a model to predict the patients who are likely to benefit from surgery in terms of survival. Methods Data on patients with mLUAD were extracted from the Surveillance, Epidemiology, and End Results (SEER) database. Depending on whether surgery was performed on the primary tumor, patients were categorized into two groups: cancer-directed surgery (CDS) and no-cancer-directed surgery (No-CDS). Propensity Score Matching (PSM) was utilized to address bias between the CDS and No-CDS groups. The prognostic impact of CDS was assessed using Kaplan-Meier analysis and Cox proportional hazard models. Subsequently, we constructed a nomogram to predict the potential for surgical benefits based on multivariable logistic regression analysis using preoperative factors. Results A total of 89,039 eligible patients were identified, including 6.4% (5705) who underwent surgery. Following PSM, the CDS group demonstrated a significantly longer median overall survival (mOS) compared with the No-CDS group (23 [21-25] vs. 7 [7-8] months; P < 0.001). The nomogram showed robust performance in both the training and validation sets (area under the curve [AUC]: 0.698 and 0.717, respectively), and the calibration curves exhibited high consistency. The nomogram proved clinically valuable according to decision curve analysis (DCA). According to this nomogram, surgical patients were categorized into two groups: no-benefit candidates and benefit candidates groups. Compared with the no-benefit candidate group, the benefit candidate group was associated with longer survival (mOS: 25 vs. 6 months, P < 0.001). Furthermore, no difference in survival was observed between the no-benefit candidates and the no-surgery groups (mOS: 6 vs. 7 months, P = 0.9). Conclusions A practical nomogram was developed to identify optimal CDS candidates among patients with mLUAD.
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Affiliation(s)
- Yuying Qi
- Fourth Hospital of Hebei Medical University, Qiao Dong Qu, Shi Jia Zhuang Shi, He Bei Sheng, 050010, China
| | - Xiaojin Guo
- Fourth Hospital of Hebei Medical University, Qiao Dong Qu, Shi Jia Zhuang Shi, He Bei Sheng, 050010, China
| | - Zijie Li
- Fourth Hospital of Hebei Medical University, Qiao Dong Qu, Shi Jia Zhuang Shi, He Bei Sheng, 050010, China
| | - Bingzhang Ren
- Fourth Hospital of Hebei Medical University, Qiao Dong Qu, Shi Jia Zhuang Shi, He Bei Sheng, 050010, China
| | - Zhiyu Wang
- Fourth Hospital of Hebei Medical University, Qiao Dong Qu, Shi Jia Zhuang Shi, He Bei Sheng, 050010, China
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Eliason S, Hong L, Sweat Y, Chalkley C, Cao H, Liu Q, Qi H, Xu H, Zhan F, Amendt BA. Extracellular vesicle expansion of PMIS-miR-210 expression inhibits colorectal tumour growth via apoptosis and an XIST/NME1 regulatory mechanism. Clin Transl Med 2022; 12:e1037. [PMID: 36116139 PMCID: PMC9482803 DOI: 10.1002/ctm2.1037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 08/10/2022] [Accepted: 08/15/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) has a high mortality rate, and therapeutic approaches to treat these cancers are varied and depend on the metabolic state of the tumour. Profiles of CRC tumours have identified several biomarkers, including microRNAs. microRNA-210 (miR-210) levels are directly correlated with CRC survival. miR-210 expression is higher in metastatic colon cancer cells versus non-metastatic and normal colon epithelium. Therefore, efficient methods to inhibit miR-210 expression in CRC may provide new advances in treatments. METHODS Expression of miRs was determined in several metastatic and non-metastatic cell lines. miR-210 expression was inhibited using PMIS-miR-210 in transduced cells, which were transplanted into xenograft mice. In separate experiments, CRC tumours were allowed to grow in xenograft mice and treated with therapeutic injections of PMIS-miR-210. Molecular and biochemical experiments identified several new pathways targeted by miR-210 inhibition. RESULTS miR-210 inhibition can significantly reduce tumour growth of implanted colon cancer cells in xenograft mouse models. The direct administration of PMIS-miR-210 to existing tumours can inhibit tumour growth in both NSG and Foxn1nu/j mouse models and is more efficacious than capecitabine treatments. Tumour cells further transfer the PMIS-miR-210 inhibitor to neighbouring cells by extracellular vesicles to inhibit miR-210 throughout the tumour. miR-210 inhibition activates the cleaved caspase 3 apoptotic pathway to reduce tumour formation. We demonstrate that the long non-coding transcript XIST is regulated by miR-210 correlating with decreased XIST expression in CRC tumours. XIST acts as a competing endogenous RNA for miR-210, which reduces XIST levels and miR-210 inhibition increases XIST transcripts in the nucleus and cytoplasm. The increased expression of NME1 is associated with H3K4me3 and H3K27ac modifications in the NME1 proximal promoter by XIST. CONCLUSION Direct application of the PMIS-miR-210 inhibitor to growing tumours may be an effective colorectal cancer therapeutic.
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Affiliation(s)
- Steven Eliason
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
- Craniofacial Anomalies Research CenterThe University of IowaIowa CityIowaUSA
| | - Liu Hong
- Craniofacial Anomalies Research CenterThe University of IowaIowa CityIowaUSA
- Iowa Institute for Oral Health ResearchThe University of IowaIowa CityIowaUSA
| | - Yan Sweat
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
- Craniofacial Anomalies Research CenterThe University of IowaIowa CityIowaUSA
| | - Camille Chalkley
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
- Craniofacial Anomalies Research CenterThe University of IowaIowa CityIowaUSA
| | - Huojun Cao
- Iowa Institute for Oral Health ResearchThe University of IowaIowa CityIowaUSA
| | - Qi Liu
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
| | - Hank Qi
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
| | - Hongwei Xu
- Department of Internal MedicineUniversity of Arkansas for Medical ScienceLittle RockArkansasUSA
| | - Fenghuang Zhan
- Department of Internal MedicineUniversity of Arkansas for Medical ScienceLittle RockArkansasUSA
| | - Brad A. Amendt
- Department of Anatomy and Cell BiologyThe University of IowaIowa CityIowaUSA
- Craniofacial Anomalies Research CenterThe University of IowaIowa CityIowaUSA
- Iowa Institute for Oral Health ResearchThe University of IowaIowa CityIowaUSA
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Díez-Alonso M, Mendoza-Moreno F, Jiménez-Álvarez L, Nuñez O, Blazquez-Martín A, Sanchez-Gollarte A, Matías-García B, Molina R, San-Juan A, Gutierrez-Calvo A. Prognostic factors of survival in stage IV colorectal cancer with synchronous liver metastasis: Negative effect of the KRAS mutation. Mol Clin Oncol 2021; 14:93. [PMID: 33767862 PMCID: PMC7976435 DOI: 10.3892/mco.2021.2255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 02/09/2021] [Indexed: 01/07/2023] Open
Abstract
The aim of the present study was to identify predictive parameters of survival in patients affected by stage IV colorectal cancer with synchronous and bilateral liver metastases. A retrospective cohort study was performed. Patients diagnosed between January 2013 and December 2018 were included in the present study. Data on the histopathological, clinical and treatment factors (chemotherapy as the first measure or resection of the primary tumor) were collected. The effect of each variable on survival was evaluated using Cox regression analysis. A total of 104 patients were included [43 women (41.3%) and 61 men (58.7%); mean age, 63 years]. The long-term survival rate at 36 months was 29% (median, 25 months). Kaplan-Meier analysis was used to estimate that survival was higher in patients with wild-type KRAS tumors (42%) than in patients with mutated KRAS tumors (9%; P=0.001). In the multivariate analysis, KRAS mutation (HR, 2.484; 95% CI, 1.472-4.192), T4 tumors (HR, 1.795; 95% CI, 1.045-3.084), resection/local treatment of hepatic metastases (HR, 0.447; 95% CI, 0.222-0.901), Eastern Cooperative Oncology Group performance status (HR, 1.632; 95% CI, 1.182-2.254), were revealed to have independent predictive value. The type of treatment (chemotherapy or resection of the primary tumor) did not influence the survival. The results indicated that mutation of the KRAS gene was an important prognostic factor and associated with survival.
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Affiliation(s)
- Manuel Díez-Alonso
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Fernando Mendoza-Moreno
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Laura Jiménez-Álvarez
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Oscar Nuñez
- National Center for Epidemiology, Carlos III Health Institute, Madrid 28029, Spain
| | - Alma Blazquez-Martín
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Ana Sanchez-Gollarte
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Belén Matías-García
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Raquel Molina
- Department of Oncology, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Alberto San-Juan
- Department of Oncology, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
| | - Alberto Gutierrez-Calvo
- Department of General and Digestive Surgery, Príncipe de Asturias Teaching Hospital, Alcalá de Henares, Madrid 28805, Spain
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Li S, Dong D, Geng J, Zhu X, Shi C, Zhang Y, Wang H, Zhou S, Wu H, Cai Y, Li Y, Wang W. Stereotactic body radiotherapy prolongs the progression-free survival and delays the change of systemic therapy regimen in patients with lung oligoprogressive metastatic colorectal cancer. Asia Pac J Clin Oncol 2021; 18:e64-e72. [PMID: 33629479 DOI: 10.1111/ajco.13557] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 12/12/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE To analyze the effect of stereotactic body radiotherapy (SBRT) on colorectal cancer (CRC) patients with lung oligoprogression (OP). METHOD Patients with lung OP from CRC treated by SBRT at our center were included in this retrospective analysis. The progression-free survival (PFS), change of systemic therapy (CST), local control (LC), and overall survival (OS) were analyzed. Cumulative incidence was used to report CST, and the Kaplan-Meier method was used to evaluate PFS and LC. RESULTS A total of 17 patients with 38 lung OP lesions treated by SBRT from October 2012 to December 2018 were involved. All patients had undergone radical resection for primary CRC and administered with standard systemic therapy regimens (seven for the first line and 10 for the second line). Among them, nine (52.9%) had received targeted therapy before SBRT, 14 (82.4%) patients underwent chemotherapy, and 12 received targeted therapy after SBRT. Six patients (35.3%) underwent CST after a median time of 5.2 months (range: 1.7-27.5 months). The median follow-up was 9.9 months, and the 1-year OS rate for all patients was 73.5%. Progression was observed in of 14 of 17 patients (82.4%), and the 6-month PFS for all patients was 25.9%. Univariate analysis indicated that only targeted therapy before SBRT was a beneficial prognostic indicator for 6-month PFS (P = .026) and N-PFS (P = .013). The 1-year LC for all 38 lesions was 77.8%, and during and after SBRT, no grade 3 or higher toxicities were observed. CONCLUSION SBRT combined with systemic therapy made partial CRC patients with lung OP avoid the progress within 6 months and delayed the need for CST to 5.2 months, and targeted therapy before SBRT was a positive indicator of PFS.
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Affiliation(s)
- Shuai Li
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Dezuo Dong
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Jianhao Geng
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Xianggao Zhu
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Chen Shi
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Yangzi Zhang
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Hongzhi Wang
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Shun Zhou
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Hao Wu
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Yong Cai
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Yongheng Li
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
| | - Weihu Wang
- Department of Radiation Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, Beijing, China
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Tan WJ, Patil S, Guillem JG, Paty PB, Weiser MR, Nash GM, Smith JJ, Pappou EP, Wei IH, Garcia-Aguilar J. Primary Tumor-Related Complications and Salvage Outcomes in Patients with Metastatic Rectal Cancer and an Untreated Primary Tumor. Dis Colon Rectum 2021; 64:45-52. [PMID: 33306531 PMCID: PMC7931667 DOI: 10.1097/dcr.0000000000001803] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND For rectal cancer with unresectable metastases, current practice favors omitting interventions directed at the primary tumor in asymptomatic patients. OBJECTIVE This study aimed to determine the proportion of patients with primary tumor-related complications, characterize salvage outcomes, and measure survival in patients with metastatic rectal cancer who did not undergo upfront intervention for their primary tumor. DESIGN This is a retrospective analysis. SETTING This study was conducted at a comprehensive cancer center. PATIENTS Patients who presented between January 1, 2008, and December 31, 2015, with synchronous stage IV rectal cancer, an unresected primary tumor, and no prior primary tumor-directed intervention were selected. MAIN OUTCOME MEASURES The main outcome measured was the rate of primary tumor-related complications in the cohort that did not receive any primary tumor-directed intervention. The Kaplan-Meier method and Cox regression analysis were used to determine whether complications are associated with survival. RESULTS The cohort comprised 358 patients with a median age of 56 years (22-92). Median follow-up was 26 months (range, 1-93 months). Among the 168 patients (46.9%) who eventually underwent elective resection of the primary tumor, the surgery was performed with curative intent in 66 patients (18.4%) and preemptive intent in 102 patients (28.5%). Of the 190 patients who did not undergo an upfront or elective intervention for the primary tumor, 68 (35.8%) experienced complications. Nonsurgical intervention for complications was attempted in 34 patients with an overall success rate of 61.8% (21/34). Surgical intervention was performed in 47 patients (including 13 patients for whom nonsurgical intervention failed): diversion in 26 patients and resection in 21 patients. Of those 47 patients, 42 (89.4%) ended up with a colostomy or ileostomy. LIMITATIONS This study was conducted at a single center. CONCLUSION A significant proportion of patients with metastatic rectal cancer and untreated primary tumor experience primary tumor-related complications. These patients should be followed closely, and preemptive intervention (resection, diversion, or radiation) should be considered if the primary tumor progresses despite systemic therapy. See Video Abstract at http://links.lww.com/DCR/B400. COMPLICACIONES RELACIONADAS CON EL TUMOR PRIMARIO Y RESULTADOS DE RESCATE EN PACIENTES CON CÁNCER DE RECTO METASTÁSICO Y UN TUMOR PRIMARIO NO TRATADO: Para el cáncer de recto con metástasis no resecables, la práctica actual favorece la omisión de las intervenciones dirigidas al tumor primario en pacientes asintomáticos.Determinar la proporción de pacientes con complicaciones relacionadas con el tumor primario, caracterizar los resultados de rescate y medir la supervivencia en pacientes con cáncer rectal metastásico que no se sometieron a una intervención inicial para su tumor primario.Análisis retrospectivo.Centro oncológico integral.Pacientes que se presentaron entre el 1 de enero de 2008 y el 31 de diciembre de 2015 con cáncer de recto en estadio IV sincrónico, un tumor primario no resecado y sin intervención previa dirigida al tumor primario.Tasa de complicaciones relacionadas con el tumor primario en la cohorte que no recibió ninguna intervención dirigida al tumor primario. Se utilizó el método de Kaplan-Meier y el análisis de regresión de Cox para determinar si las complicaciones están asociadas con la supervivencia.La cohorte estuvo compuesta por 358 pacientes con una mediana de edad de 56 años (22-92). La mediana de seguimiento fue de 26 meses (rango, 1 a 93 meses). Entre los 168 pacientes (46,9%) que finalmente se sometieron a resección electiva del tumor primario, la cirugía se realizó con intención curativa en 66 pacientes (18,4%) y con intención preventiva en 102 pacientes (28,5%). De los 190 pacientes que no se sometieron a una intervención inicial o electiva para el tumor primario, 68 (35,8%) experimentaron complicaciones. Se intentó una intervención no quirúrgica para las complicaciones en 34 pacientes con una tasa de éxito global del 61,8% (21 de 34). La intervención quirúrgica se realizó en 47 pacientes (incluidos 13 pacientes en los que falló la intervención no quirúrgica): derivación en 26 pacientes y resección en 21 pacientes. De esos 47 pacientes, 42 (89,4%) terminaron con una colostomía o ileostomía.Único centro.Una proporción significativa de pacientes con cáncer de recto metastásico y primario no tratado experimentan complicaciones relacionadas con el tumor primario. Se debe hacer un seguimiento estrecho de estos pacientes y considerar la posibilidad de una intervención preventiva (resección, derivación o radiación) si el tumor primario progresa a pesar de la terapia sistémica. Consulte Video Resumen en http://links.lww.com/DCR/B400.
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Affiliation(s)
- Winson J. Tan
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
- Department of General Surgery, Sengkang General Hospital, Singapore
| | - Sujata Patil
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jose G. Guillem
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Philip B. Paty
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Martin R. Weiser
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Garrett M. Nash
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - J. Joshua Smith
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Emmanouil P. Pappou
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Iris H. Wei
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Julio Garcia-Aguilar
- Department of Surgery, Colorectal Service, Memorial Sloan Kettering Cancer Center, New York, New York
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Nichani P, Popovic MM, Schlenker MB, Park J, Ahmed IIK. Microinvasive glaucoma surgery: A review of 3476 eyes. Surv Ophthalmol 2020; 66:714-742. [PMID: 32998003 DOI: 10.1016/j.survophthal.2020.09.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 02/06/2023]
Abstract
Microinvasive glaucoma surgery (MIGS) is a potentially safer and more efficacious method studied in patients with mild-to-moderate open-angle glaucoma requiring less invasive treatment goals; however, the literature on MIGS must be thoroughly evaluated. We conducted a review of MIGS by searching MEDLINE, EMBASE, and Cochrane CENTRAL. Primary efficacy indicators were reductions in intraocular pressure and topical medication use postoperatively. While all comparative randomized controlled trials assessing MIGS in English peer-reviewed journals were included, only observational studies with a target follow-up of at least one year and a high priority score were analyzed, resulting in a total of 3476 eyes across 20 trials. The mean age was 69.5 ± 2.9 years, 53.7% were female, and 77.4% were Caucasian. One study had last follow-up at less than one year, fifteen studies had follow-up extending 1-2 years, and four had longer than two years of follow-up. A pattern of more significant intraocular pressure and medication reduction was observed in patients who underwent MIGS (n = 2170) relative to control (n = 1306) interventions. iStent had the most literature supporting its efficacy, followed by Hydrus. The most common adverse events after MIGS implantation included stent obstruction, inflammation, and subsequent surgical intervention. Surgical complication rates and efficacy are favorable after MIGS. This review helps to consolidate the high-quality evidence that exists for various MIGS procedures and to identify gaps where further research is needed.
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Affiliation(s)
- Prem Nichani
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Marko M Popovic
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada
| | - Matthew B Schlenker
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Kensington Eye Institute, Toronto, Ontario, Canada
| | - Jeff Park
- Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Iqbal Ike K Ahmed
- Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Prism Eye Institute, Mississauga, Ontario, Canada; Department of Ophthalmology, Trillium Health Partners, Mississauga, Ontario, Canada.
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7
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Xu J, Ma T, Ye Y, Pan Z, Lu D, Pan F, Peng W, Sun G. Surgery on primary tumor shows survival benefit in selected stage IV colon cancer patients: A real-world study based on SEER database. J Cancer 2020; 11:3567-3579. [PMID: 32284753 PMCID: PMC7150453 DOI: 10.7150/jca.43518] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/02/2020] [Indexed: 12/16/2022] Open
Abstract
Objectives: Most patients with stage IV colon cancer did not have the opportunity for curative surgery, only selected patients could benefit from surgery. This study aimed to determine whether surgery on the primary tumor (SPT) should be performed in patients with stage IV colon cancer and how to select patients for SPT. Methods: This study included 48,933 patients with stage IV colon cancer who were identified in the Surveillance, Epidemiology and End Results (SEER) database between 1998 and 2015. Propensity score matching (PSM) analysis was adopted to balance baseline differences between SPT and non-surgery groups. Kaplan-Meier (K-M) curves were utilized to compare the overall survival (OS). Prognostic nomograms were generated to predict survival based on pre- and post-operative risk factors. Patients were divided into low, middle, and high mortality risk subsets for OS by X-tile analyses based on scores derived from above nomograms. Results: Patients with SPT had a significantly longer OS than those without surgery, regardless of the metastatic sites and diagnostic years. Nomograms, according to the pre- and post-operative risk factors, showed moderate discrimination (all C-indexes above 0.7). Based on X-tile analyses, low mortality risk subset (post-operative score ≤ 22.3, preoperative score ≤ 9.7) recommended for SPT, and high mortality risk was not. Conclusions: SPT led to prolonged survival in stage IV colon cancer. Our nomograms would help to select suitable patients for SPT.
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Affiliation(s)
- Jing Xu
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Tai Ma
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Yuanzi Ye
- Department of Pathology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Zhipeng Pan
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Donghui Lu
- Department of Radiology, The 901st Hospital of the Joint Logistics Support Force of PLA, Hefei, Anhui Province 230031, China
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Wanren Peng
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
| | - Guoping Sun
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province 230000, China
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8
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Fiori E, Lamazza A, Sterpetti AV, Crocetti D, DE Felice F, DI Muzio M, Mingoli A, Sapienza P, DE Toma G. Quality of Life for Patients With Incurable Stage IV Colorectal Cancer: Randomized Controlled Trial Comparing Resection Versus Endoscopic Stenting. In Vivo 2020; 33:2065-2070. [PMID: 31662539 DOI: 10.21873/invivo.11705] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/09/2019] [Accepted: 09/11/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND/AIM A prospective randomized open label parallel trial, comparing the quality of life (QoL) after endoscopic placement of a self-expandable metal stent or primary tumor resection, in patients with stage IV colorectal cancer was performed. PATIENTS AND METHODS Thirty-three patients affected with stage IV colorectal cancer and unresectable metastases were randomly assigned into two groups: Group 1 (16 patients), that underwent self-expandable metal stent positioning and Group 2 (17 patients), in which primary tumor resection was performed. Karnofsky performance scale and QoL assessment using the EQ-5D-5L™ questionnaire was administered before treatment and thereafter at 1, 3 and 6 months. RESULTS At 1 month, index values showed a statistically significant deterioration of the QoL in patients of Group 2 when compared to those of Group 1 (p=0.001; 95%CI=0.065-0.211) whereas, at 6 months, index values showed a statistically significant deterioration of the QoL in patients of Group 1 (p<0.025; 95%CI=0.017-0.238). CONCLUSION QoL in patients affected with stage IV colorectal cancer has a bimodal fluctuation pattern: at 1-month it was better in patients that received stent, but at 6-months it was significantly better in patients submitted to surgical resection.
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Affiliation(s)
- Enrico Fiori
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Antonietta Lamazza
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Antonio V Sterpetti
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Daniele Crocetti
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Francesca DE Felice
- Department of Radiology, Radiotherapy, Oncology and Anatomopathology, "Sapienza" University of Rome, Rome, Italy
| | - Marco DI Muzio
- Department of Clinical and Molecular Medicine, "Sapienza" University of Rome, Rome, Italy
| | - Andrea Mingoli
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Paolo Sapienza
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
| | - Giorgio DE Toma
- Department of Surgery "Pietro Valdoni", "Sapienza" University of Rome, Rome, Italy
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9
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Leijssen LGJ, Dinaux AM, Kunitake H, Bordeianou LG, Berger DL. The impact of postoperative morbidity on survival in patients with metastatic colon and rectal cancer. J Surg Oncol 2019; 120:460-472. [PMID: 31276213 DOI: 10.1002/jso.25610] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 06/13/2019] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Avoiding postoperative morbidity is essential in patients with advanced cancer. To further improve treatment in stage IV colorectal cancer, knowledge about risk factors which effect short- and long-term outcomes is important. METHODS All stage IV colon and rectal cancer who underwent elective surgery between 2004 and 2015 were included (n = 345). We compared resectable colon and rectal patients, and unresectable colon and rectal cancer patients. RESULTS Median follow-up duration was 22.2 (unresectable) and 56.7 months (resectable) with no difference in tumor location. Colon cancer patients were more often considered unresectable (P < .001). Rectal procedures were correlated with a higher morbidity rate and a longer surgical duration (P < .001). In the resectable cohort, obese patients, open procedures and prolonged surgery were independently associated with postoperative complications. Considering the palliative group, neoadjuvant treatment and age were correlated with worse outcomes. Morbidity was not associated with long-term outcomes in the resectable cohort. However, unresectable patients who developed respiratory (hazard ratio [HR]: 7.53) or cardiac (HR: 3.75) complications and patients with an American Society of Anesthesiologists-score III to IV (HR: 1.51) had an impaired survival. CONCLUSION Our results emphasize the need for an adequate preoperative assessment to identify patients at risk for postoperative complications and impaired survival.
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Affiliation(s)
- Lieve G J Leijssen
- Department of General and Gastrointestinal Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Anne M Dinaux
- Department of General and Gastrointestinal Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Hiroko Kunitake
- Department of General and Gastrointestinal Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Liliane G Bordeianou
- Department of General and Gastrointestinal Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - David L Berger
- Department of General and Gastrointestinal Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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10
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Lorimer PD, Motz BM, Kirks RC, Han Y, Symanowski JT, Hwang JJ, Salo JC, Hill JS. Frequency of unplanned surgery in patients with stage IV colorectal cancer receiving palliative chemotherapy with an intact primary: An analysis of SEER‐Medicare. J Surg Oncol 2019; 120:407-414. [DOI: 10.1002/jso.25508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 05/05/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Patrick D. Lorimer
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Benjamin M. Motz
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Russell C. Kirks
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Yimei Han
- Department of Biostatistics, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - James T. Symanowski
- Department of Biostatistics, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Jimmy J. Hwang
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Jonathan C. Salo
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
| | - Joshua S. Hill
- Department of Surgery, Carolinas Medical CenterLevine Cancer Institute Charlotte North Carolina
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11
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Fung SM, Wong XY, Lee SX, Miao H, Hartman M, Wee HL. Performance of Single-Nucleotide Polymorphisms in Breast Cancer Risk Prediction Models: A Systematic Review and Meta-analysis. Cancer Epidemiol Biomarkers Prev 2018; 28:506-521. [DOI: 10.1158/1055-9965.epi-18-0810] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/30/2018] [Accepted: 12/03/2018] [Indexed: 11/16/2022] Open
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12
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Lau JW, Chang HS, Lee KY, Gwee YX, Lee WQ, Chong CS. Survival outcomes following primary tumor resection for patients with incurable metastatic colorectal carcinoma: Experience from a single institution. J Dig Dis 2018; 19:550-560. [PMID: 30117288 DOI: 10.1111/1751-2980.12657] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 07/13/2018] [Accepted: 08/13/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Palliative primary tumor resection (PTR) has been used for preventing and treating tumor-related complications. We aimed to determine whether PTR can increase overall survival (OS) in patients with unresectable metastatic colorectal cancer (CRC). METHODS A retrospective review of a prospectively collected database in a single center was performed. Patients diagnosed with metastatic CRC from January 2004 to December 2014 were included. Patients who had attained curative resection or had disease recurrence were excluded. All patients were discussed at a multidisciplinary tumor board where subsequent treatment decisions were made. RESULTS Altogether 408 patients were analyzed. Of these 145 received PTR with palliative chemotherapy (PC; group A), 110 received PC only (group B), 52 received PTR only (group C), while 101 received neither PTR nor PC (group D). Undergoing PTR led to statistically significant improvement in OS (22.7 months vs 12.1 months vs 6.9 months vs 2.7 months, P < 0.001). We performed subgroup analyses to control for potential confounders and found that the influence of PTR on OS persisted. With multivariate analysis, the predictors of poor OS were no PTR (hazards ratio [HR] 2.32, 95% confidence interval [CI] 1.82-2.96, P < 0.001), no PC (HR 4.25, 95% CI 3.27-5.33, P < 0.001) and the presence of peritoneal metastases (HR 1.37, 95% CI 1.06-1.78, P = 0.018). Diversion surgery did not lead to a statistical difference in OS. CONCLUSIONS The absences of PTR and PC, and peritoneal metastases are independently associated with decreased OS in patients with unresectable metastatic CRC. Randomized controlled trials are needed to verify this observation.
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Affiliation(s)
- Joel Wl Lau
- Department of Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Heidi Sy Chang
- Department of Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Kai Y Lee
- Department of Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Yong X Gwee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wen Q Lee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Choon S Chong
- Department of Surgery, University Surgical Cluster, National University Hospital, Singapore
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13
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Gu J, Groot G, Boden C, Busch A, Holtslander L, Lim H. Review of Factors Influencing Women's Choice of Mastectomy Versus Breast Conserving Therapy in Early Stage Breast Cancer: A Systematic Review. Clin Breast Cancer 2018; 18:e539-e554. [DOI: 10.1016/j.clbc.2017.12.013] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 12/22/2017] [Indexed: 01/11/2023]
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14
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Lau JWL, Chang HSY, Lee KY, Gwee YX, Lee WQ, Chong CS. Modern-day palliative chemotherapy for metastatic colorectal cancer: does colonic resection affect survival? ANZ J Surg 2018; 88:E772-E777. [PMID: 29938886 DOI: 10.1111/ans.14726] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/02/2018] [Accepted: 05/04/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Patients with metastatic colorectal cancer (mCRC) with surgically incurable metastases would be recommended for palliative chemotherapy (PC). The role of surgical intervention is debatable with no conclusive evidence for routine primary tumour resection (PTR) or stoma creation. We aimed to study if surgical intervention conferred a survival benefit in patients with mCRC who received upfront systemic therapy. METHODS A retrospective review of a prospectively collected database in a single centre was performed. Patients diagnosed with mCRC from January 2004 to December 2014 were included. We excluded patients who had an upfront surgical intervention, had no treatment with systemic therapy or had attained curative resection. The decision for surgery was based on the outcome of a multidisciplinary tumour board. Demographic, clinicopathological, treatment and follow-up data were collected. Univariate and multivariate analyses were performed. RESULTS Out of 408 patients with mCRC with incurable metastases, we analysed 124 patients who had upfront PC. Twenty-nine had PC + PTR (group A), 10 had PC + stoma (group B) and 85 had PC only (group C). Undergoing PTR led to significant improvement in overall survival (OS; 30.8 versus 13.4 versus 11.0 months, P < 0.001). With multivariate analysis, undergoing PTR and receiving biologics were independent good prognostic variables. Surgical resection was safe with minimal complications. CONCLUSIONS PTR was found to increase OS while stoma creation had no impact on OS. The benefits and safety of undergoing PTR may be a result of selection bias. Further prospective studies are required to confirm the observations of this study.
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Affiliation(s)
- Joel Wen Liang Lau
- Department of General Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Heidi Sian Ying Chang
- Department of General Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Kai Yin Lee
- Department of General Surgery, University Surgical Cluster, National University Hospital, Singapore
| | - Yong Xiang Gwee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Wen Qiang Lee
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Choon Seng Chong
- Department of General Surgery, University Surgical Cluster, National University Hospital, Singapore
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15
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Tang GH, Satkunam M, Pond GR, Steinberg GR, Blandino G, Schünemann HJ, Muti P. Association of Metformin with Breast Cancer Incidence and Mortality in Patients with Type II Diabetes: A GRADE-Assessed Systematic Review and Meta-analysis. Cancer Epidemiol Biomarkers Prev 2018; 27:627-635. [PMID: 29618465 DOI: 10.1158/1055-9965.epi-17-0936] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/15/2017] [Accepted: 03/30/2018] [Indexed: 11/16/2022] Open
Abstract
Background: Preclinical data suggest that metformin may reduce breast cancer incidence and improve cancer prognosis. However, the current evidence in observational studies is inconclusive. A systematic review and meta-analysis was conducted to assess the effect of metformin on the incidence of breast cancer and all-cause mortality in patients with type II diabetes (T2D).Methods: A literature search was performed on Medline, EMBASE, and the Cochrane library from inception to November 2016. Outcomes were incidence of breast cancer and all-cause mortality. Risk of bias and overall certainty of evidence was assessed using the Newcastle-Ottawa Scale and Grading of Recommendations Assessment, Development, and Evaluation (GRADE), respectively. Meta-analyses were performed using the most fully adjusted ORs or HRs and 95% confidence intervals (95% CI) as effect measures.Results: A total of 12 observational studies were included for breast cancer incidence and 11 studies for all-cause mortality. No significant association was found between metformin exposure and incidence of breast cancer (OR = 0.93; 95% CI, 0.85-1.03; I2 = 35%). A 45% risk reduction was observed for all-cause mortality (HR = 0.55; 95% CI, 0.44-0.70; I2 = 81%). Presence of publication bias is strongly suspected for both outcomes using Egger's funnel plots.Conclusions: The use of metformin may improve overall survival in patients with T2D and breast cancer. No effect of metformin on the incidence of breast cancer was observed. Interpretation of results is limited by the observational nature of the studies and resulting biases.Impact: Clinical trials are warranted to determine the role of metformin in breast cancer risk reduction and prognosis. Cancer Epidemiol Biomarkers Prev; 27(6); 627-35. ©2018 AACR.
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Affiliation(s)
- Grace H Tang
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Meloja Satkunam
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Gregory R Pond
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.,Department of Oncology, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Gregory R Steinberg
- Department of Medicine, Division of Endocrinology, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.,Department of Biochemistry and Biomedical Sciences, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Giovanni Blandino
- Department of Oncology, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada.,Oncogenomic and Epigenetic Unit, Italian National Cancer Institute 'Regina Elena,' Rome, Italy
| | - Holger J Schünemann
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Paola Muti
- Department of Health Research Methods, Evidence, and Impact, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada. .,Department of Oncology, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
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16
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Mukai T, Uehara K, Aiba T, Nakamura H, Ebata T, Nagino M. Outcomes of stage IV patients with colorectal cancer treated in a single institution: What is the key to the long-term survival? J Anus Rectum Colon 2018; 2:16-24. [PMID: 31583318 PMCID: PMC6768826 DOI: 10.23922/jarc.2017-021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 10/03/2017] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES The purpose of this study is to summarize our short- and long-term treatment results for stage IV colorectal cancer (CRC) and to clarify the factors predicting the favorable long-term survival. METHODS Between January 2008 and December 2015, 149 consecutive patients with stage IV CRC underwent initial treatment at Nagoya University Hospital. Their clinical and pathological characteristics, the treatment methods used, and the outcomes were retrospectively analyzed. RESULTS The median observation period was 23 months. All of the primary and metastatic lesions were technically resectable in 74 patients; however, the remaining 75 were judged as initially unresectable. R0/1 resection during the treatment course was achieved in 74 patients (50%). For the cohort as a whole, the 5-year overall survival (OS) rate was 35%. The 5-year OS rate in the R0/1 resection group was 57%, which was significantly better than that of the non-R0/1 resection group (6%, p < 0.001). In the R0/1 resection group, perioperative chemotherapy significantly improved the outcome (5-year OS; 62% vs. 0%, p = 0.03). In the non-R0/1 resection group, primary tumor resection was associated with a significantly higher favorable prognosis (3-year OS; 20.4% vs. 0%, p = 0.026). Moreover, the additional use of molecular targeted drugs significantly improved the survival. In multivariate analysis, the differentiated histologic type, R0/1 resection, and parallel use of molecular targeted drugs remained independent factors of a favorable outcome. CONCLUSIONS The present study suggested that aggressive curative resection with perioperative chemotherapy might improve survival and that primary tumor resection might improve the outcome in the non-R0/1 group.
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Affiliation(s)
- Toshiki Mukai
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Keisuke Uehara
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toshisada Aiba
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hayato Nakamura
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomoki Ebata
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masato Nagino
- Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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17
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Wang Z, Wang X, Yuan J, Zhang X, Zhou J, Lu M, Liu D, Li J, Shen L. Survival Benefit of Palliative Local Treatments and Efficacy of Different Pharmacotherapies in Colorectal Cancer With Lung Metastasis: Results From a Large Retrospective Study. Clin Colorectal Cancer 2017; 17:e233-e255. [PMID: 29305209 DOI: 10.1016/j.clcc.2017.12.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 12/07/2017] [Indexed: 01/04/2023]
Abstract
BACKGROUND For most colorectal cancer patients with initial lung metastasis (LM), the only suitable treatments are palliative, including palliative local therapy and pharmacotherapy. We investigated the role of palliative local treatments in prolonging survival and the efficacy of different pharmacotherapies. PATIENTS AND METHODS After performing a medical record review of 2233 patients with metastatic colorectal cancer, 684 were identified as having LM. Their clinicopathologic characteristics, treatment patterns, and outcomes were analyzed retrospectively. RESULTS For nonresectable initial LM, patients receiving palliative local therapy had significantly longer median progression-free survival (PFS) and overall survival (OS) than those treated with pharmacotherapy alone: PFS 16.1 months versus 7.4 months (P < .001) and OS 51.8 months versus 23.8 months (P < .001), respectively. Cox multivariate analysis confirmed the survival benefit induced by palliative local therapy. Chemonaive patients receiving single-agent fluoropyrimidine had shorter PFS and longer OS compared to oxaliplatin- or irinotecan-based doublets when used as first-line treatment (PFS 4.8, 7.4, and 7.3 months; and OS 28.7, 21.2, and 20.1 months, respectively); however, these differences were not statistically significant. The addition of targeted agents to cytotoxic drugs prolonged PFS (10.5 vs. 7.2 months, P = .005) but not OS (27.8 vs. 21.2 months, P = .454). Carcinoembryonic antigen level, LM-associated symptoms, extrapulmonary disease, and histopathologic type were independent pretreatment prognostic factors. CONCLUSION Local treatments of LM may confer a survival benefit in the palliative setting. First-line single-agent fluoropyrimidine may be used in patients with good prognosis.
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Affiliation(s)
- Zhenghang Wang
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Xicheng Wang
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Jiajia Yuan
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Xiaotian Zhang
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Jun Zhou
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Ming Lu
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Dan Liu
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China
| | - Jian Li
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China.
| | - Lin Shen
- Department of Gastrointestinal Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Institute, Beijing, China.
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18
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Liu Q, Hao L, Lou Z, Gao X, Gong H, Hong Y, Fu C, Zhang W. Survival time and prognostic factors of patients with initial noncurative colorectal liver metastases. Medicine (Baltimore) 2017; 96:e8831. [PMID: 29390420 PMCID: PMC5758122 DOI: 10.1097/md.0000000000008831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 10/08/2017] [Accepted: 11/01/2017] [Indexed: 02/07/2023] Open
Abstract
The true survival benefit of different curative strategies involving type of operative procedure and timing for patients with initial noncurative colorectal liver metastases remains uncertain. The goal of this study was to examine the effect of primary tumor resection on patients' survival and to clarify the predictive factors related to overall survival (OS).This was a retrospective study that included 219 patients with initial noncurative colorectal liver metastases without extrahepatic disease. The clinicopathological characteristics of patients and their survival were examined. Survival analysis was performed using the Kaplan-Meier method. All variables associated with P <.05 in univariate analysis were included in multivariate analysis using a Cox proportional-hazard regression model.The 1-, 3-, 5-year OS rates of patients with simultaneous liver resection were 79.1%, 39.1%, and 28.4%, respectively, and those of patients with staged liver resection were 83.3%, 46.7%, and 36.8%, respectively (P = .380). The 1-, 3-, 5-year OS rates of patients with primary tumor resection were 57.0%, 18.2%, and 12.3%, respectively, while for the patients without primary tumor resection were 38.9%, 5.6%, and 0%, respectively (P = .012). Independent prognostic factors for OS were carbohydrate antigen19-9, primary tumor resection, tumor differentiation, and adjuvant chemotherapy.No difference in OS was observed between simultaneous liver resection and staged liver resection, while primary tumor resection was beneficial to noncurative colorectal liver metastases.
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Affiliation(s)
- Qizhi Liu
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Liqiang Hao
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Zheng Lou
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Xianhua Gao
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Haifeng Gong
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Yonggang Hong
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
| | - Chuangang Fu
- Department of Colorectal Surgery, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei Zhang
- Department of Colorectal Surgery, Changhai Hospital, Second Military Medical University
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19
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Weledji EP. Centralization of Liver Cancer Surgery and Impact on Multidisciplinary Teams Working on Stage IV Colorectal Cancer. Oncol Rev 2017; 11:331. [PMID: 28814999 PMCID: PMC5538223 DOI: 10.4081/oncol.2017.331] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 12/15/2016] [Accepted: 07/17/2017] [Indexed: 12/17/2022] Open
Abstract
Surgical resection is the most effective treatment approach for colorectal liver metastases but only a minority of patients is suitable for upfront surgery. The treatment strategies of stage IV colorectal cancer have shifted towards a continuum of care in which medical and surgical treatment combinations are tailored to the clinical setting of the individual patient. The optimization of treatment through appropriate decision-making and multimodal therapy for stage IV colorectal cancer require a joint multidisciplinary meeting in a centralized liver cancer unit.
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20
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Lee KC, Ou YC, Hu WH, Liu CC, Chen HH. Meta-analysis of outcomes of patients with stage IV colorectal cancer managed with chemotherapy/radiochemotherapy with and without primary tumor resection. Onco Targets Ther 2016; 9:7059-7069. [PMID: 27895498 PMCID: PMC5117884 DOI: 10.2147/ott.s112965] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background Colorectal cancer is the third leading cause of death worldwide. Currently, novel chemotherapeutic agents are first-line therapy for unresectable stage IV colorectal cancer, while benefits of noncurative primary tumor resection in advanced disease remain debatable. Objective This meta-analysis evaluated outcomes of patients with unresectable stage IV colorectal cancer receiving systemic chemotherapy with or without primary tumor resection. Materials and methods A database search of PubMed and Cochrane Library databases identified 167 studies that were screened for relevance. After 119 were excluded, 48 were assessed for eligibility and 26 were included for meta-analysis, including 24 retrospective studies, one prospective study, and one randomized, controlled trial. Extracted data included patient demographics (age, sex), clinical data (tumor stage, metastasis), targeted therapy agents, and surgical data (with/without tumor resection). Patients’ overall and progression-free survival was compared between groups with/without primary tumor resection. Results The 26 studies included 43,903 patients with colorectal cancer, with 29,639 receiving chemotherapy/radiotherapy plus primary tumor resection, and 14,264 managed medically with chemotherapy/chemoradiotherapy alone without primary tumor resection. Patients receiving primary tumor resection plus chemotherapy/radiotherapy had longer overall survival (hazard ratio [HR 0.59], 95% confidence interval [CI] 0.51–0.68; P<0.001), with significant differences in overall survival between patients with and without primary tumor resection (HR 0.58, 95% CI 0.49–0.68; P<0.001). Longer overall survival was also found among patients receiving primary tumor resection who were treated with bevacizumab/cetuximab targeted therapy agents (HR 0.63, 95% CI 0.46–0.86; P=0.003). Patients from three studies who received primary tumor resection had longer progression-free survival (HR 0.73, 95% CI 0.58–0.91; P=0.005). Results are limited by retrospective data, inconsistent complications data, and publication bias. Conclusion Study results support primary tumor resection in stage IV colorectal cancer, but significant biases in studies suggest that randomized trials are warranted to confirm findings.
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Affiliation(s)
- Ko-Chao Lee
- Division of Colorectal Surgery, Department of Surgery
| | - Yu-Che Ou
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung
| | - Wan-Hsiang Hu
- Division of Colorectal Surgery, Department of Surgery
| | - Chia-Cheng Liu
- Department of Surgery, Pingtung Christian Hospital, Pingtung, Taiwan
| | - Hong-Hwa Chen
- Division of Colorectal Surgery, Department of Surgery
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21
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Søreide K. Resection of asymptomatic primary tumour in unresectable stage IV colorectal cancer: time to move on from propensity matched scores to randomized controlled trials. Int J Cancer 2016; 139:1927-9. [PMID: 27400774 PMCID: PMC5095777 DOI: 10.1002/ijc.30244] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Kjetil Søreide
- Department of Gastrointestinal Surgery, Stavanger University Hospital, Stavanger, Norway.,Gastrointestinal Translational Research Unit, Laboratory for Molecular Biology, Stavanger University Hospital, Stavanger, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
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22
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Cabart M, Frénel JS, Campion L, Ramée JF, Dupuis O, Senellart H, Hiret S, Douillard JY, Bennouna J. Bevacizumab Efficacy Is Influenced by Primary Tumor Resection in First-Line Treatment of Metastatic Colorectal Cancer in a Retrospective Multicenter Study. Clin Colorectal Cancer 2016; 15:e165-e174. [PMID: 27256668 DOI: 10.1016/j.clcc.2016.04.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 04/04/2016] [Accepted: 04/27/2016] [Indexed: 12/16/2022]
Abstract
INTRODUCTION There is no predictive factor of response to bevacizumab in metastatic colorectal cancer. Nevertheless, preclinical studies demonstrated an interaction between primary tumor and metastatic sites for the neoangiogenesis regulation. The primary objective of our study was to identify an effect of up-front primary tumor resection (UPTR) on bevacizumab efficacy. PATIENTS AND METHODS Between 2008 and 2010, we retrospectively analyzed progression-free survival (PFS) and overall survival (OS) of 316 patients with synchronous and metachronous metastatic colorectal cancer according to bevacizumab addition to first-line chemotherapy and UPTR. RESULTS Among 206 patients with UPTR, the addition of bevacizumab to chemotherapy significantly improved OS compared to chemotherapy alone (29.8 vs. 23.9 months respectively; hazard ratio [HR] 0.58; 95% confidence interval [CI], 0.40-0.83; P = .003). This effect was confirmed in multivariate analysis. There was also a nonsignificant trend toward improved PFS (9.7 vs. 8.4 months respectively; HR 0.71; 95% CI, 0.50-1.02; P = .062). Conversely, among 110 patients without UPTR, the addition of bevacizumab to chemotherapy had no effect on OS compared to chemotherapy alone (18.2 vs. 19.3 months respectively; HR 0.96; 95% CI, 0.65-1.42; P = .853). Bevacizumab significantly improved PFS (8.1 vs. 5.7 months respectively; HR 0.66; 95% CI, 0.45-0.96; P = .032) without confirmation in multivariate analysis. CONCLUSION In this retrospective study, bevacizumab seems to improve OS only in patients with UPTR, which could suggest a complementarity of both therapeutic modalities for antiangiogenic effect.
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Affiliation(s)
- Mathilde Cabart
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France.
| | | | - Loïc Campion
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France
| | | | | | - Hélène Senellart
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France
| | - Sandrine Hiret
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France
| | - Jean-Yves Douillard
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France
| | - Jaafar Bennouna
- Institut de Cancérologie de l'Ouest (ICO) René Gauducheau, Saint-Herblain, France
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Ahmed S, Leis A, Chandra-Kanthan S, Fields A, Reeder B, Iqbal N, Haider K, Le D, Pahwa P. Surgical Management of the Primary Tumor in Stage IV Colorectal Cancer: A Confirmatory Retrospective Cohort Study. J Cancer 2016; 7:837-45. [PMID: 27162543 PMCID: PMC4860801 DOI: 10.7150/jca.14717] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Accepted: 03/16/2016] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Observational studies have suggested that patients with stage IV colorectal cancer who undergo surgical resection of the primary tumor (SRPT) have better survival. Yet the results are not confirmed in the setting of a randomized controlled trial. Lack of randomization and failure to control prognostic variables such as performance status are major critiques to the findings of the observational studies. We previously have shown that SRPT, independent of chemotherapy and performance status, improves survival of stage IV CRC patients. The current study aims to validate our findings in patients with stage IV CRC who were diagnosed during the period of modern chemotherapy. METHODS A cohort of 569 patients with stage IV CRC diagnosed during 2006-2010 in the province of Saskatchewan was evaluated. Cox regression model was used for the adjustment of prognostic variables. RESULTS Median age was 69 years (59-95) and M: F was 1.4:1. Fifty-seven percent received chemotherapy, 91.4% received FOLFIRI or FOLFOX & 67% received a biologic agent. Median overall survival (OS) of patients who underwent SRPT and received chemotherapy was 27 months compared with 14 months of the non-resection group (p<0.0001). Median OS of patients who received all active agents and had SRPT was 39 months (95%CI: 25.1-52.9). On multivariate analysis, SRPT, hazard ratio (HR):0.44 (95%CI: 0.35-0.56), use of chemotherapy, HR: 0.33 (95%CI: 0.26-0.43), metastasectomy, HR: 0.43 (95%CI: 0.31-0.58), second line therapy, HR: 0.50 (95%CI: 0.35-0.70), and third line therapy, HR: 0.58 (95%CI: 0.41-0.83) were correlated with superior survival. CONCLUSIONS This study confirms our findings and supports a favorable association between SRPT and survival in patients with stage IV CRC who are treated with modern therapy.
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Affiliation(s)
- Shahid Ahmed
- 1. Saskatchewan Cancer Agency;; 2. Department of Oncology , University of Saskatchewan;; 3. Department of Community Health and Epidemiology, University of Saskatchewan
| | - Anne Leis
- 3. Department of Community Health and Epidemiology, University of Saskatchewan
| | | | | | - Bruce Reeder
- 3. Department of Community Health and Epidemiology, University of Saskatchewan
| | - Nayyer Iqbal
- 1. Saskatchewan Cancer Agency;; 2. Department of Oncology , University of Saskatchewan
| | - Kamal Haider
- 1. Saskatchewan Cancer Agency;; 2. Department of Oncology , University of Saskatchewan
| | - Duc Le
- 1. Saskatchewan Cancer Agency;; 2. Department of Oncology , University of Saskatchewan
| | - Punam Pahwa
- 3. Department of Community Health and Epidemiology, University of Saskatchewan;; 6. Division of Biostatistics, Department of Community Health and Epidemiology, University of Saskatchewan
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Takada T, Tsutsumi S, Takahashi R, Ohsone K, Tatsuki H, Suto T, Kato T, Fujii T, Yokobori T, Kuwano H. Control of primary lesions using resection or radiotherapy can improve the prognosis of metastatic colorectal cancer patients. J Surg Oncol 2016; 114:75-9. [PMID: 27111137 DOI: 10.1002/jso.24255] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 03/26/2016] [Indexed: 11/11/2022]
Abstract
BACKGROUND Control of the primary lesions in metastatic colorectal cancer (mCRC) is still controversial. For rectal cancer patients, not only resection but also irradiation is expected to provide palliative effects. We investigated the effects of resection and irradiation of primary lesions (local control) on the prognosis of mCRC patients. PATIENTS Forty-seven patients with mCRC at our institute were examined, with 34 in the local controlled group and 13 in the uncontrolled group. RESULTS The median survival time (MST) of the local controlled and uncontrolled groups were 2.90 and 1.39 years (P = 0.028). Cox proportional hazard regression analysis showed that local control was an independent prognostic factor (P < 0.05). The patients who underwent primary lesion resection had significantly longer MST (2.90 vs. 1.39 years, P = 0.032) than those in the uncontrolled group. In rectal cancer patients, the patients who underwent irradiation to control the primary lesions had a significantly longer MST than the uncontrolled patient group (1.97 vs. 1.39 years, P = 0.019). CONCLUSIONS Local control of primary lesions may improve the prognosis in mCRC patients. In rectal cancer patients with metastasis, not only resection but also irradiation of the primary lesions may be a useful therapeutic strategy. J. Surg. Oncol. 2016;114:75-79. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Takahiro Takada
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Soichi Tsutsumi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Ryo Takahashi
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Katsuya Ohsone
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Hironori Tatsuki
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Toshinaga Suto
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Toshihide Kato
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Takaaki Fujii
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Takehiko Yokobori
- Department of Molecular Pharmacology and Oncology, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Hiroyuki Kuwano
- Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
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Ahmed S, Leis A, Chandra-Kanthan S, Fields A, Zaidi A, Abbas T, Le D, Reeder B, Pahwa P. Regional Lymph Nodes Status and Ratio of Metastatic to Examined Lymph Nodes Correlate with Survival in Stage IV Colorectal Cancer. Ann Surg Oncol 2016; 23:2287-94. [PMID: 27016291 DOI: 10.1245/s10434-016-5200-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Indexed: 12/22/2022]
Abstract
BACKGROUND Although lymph nodes status and the ratio of metastatic to examined lymph node (LNR) are important prognostic factors in early-stage colorectal cancer (CRC), their significance in patients with metastatic disease remains unknown. The study aims to determine prognostic importance of nodal status and LNR in patients with stage IV CRC. METHODS A cohort of 1109 eligible patients who were diagnosed with synchronous metastatic CRC in Saskatchewan during 1992-2010 and underwent primary tumor resection was evaluated. We conducted the Cox proportional multivariate analyses to determine the prognostic significance of nodal status and LNR. RESULTS Median age was 70 years (22-98) and M:F was 1.2:1. Rectal cancer was found in 26 % of patients; 96 % had T3/T4 tumor, and 82 % had node positive disease. The median LNR was 0.36 (0-1.0). Fifty-four percent received chemotherapy. Median overall survival of patients who had LNR of <0.36 and received chemotherapy was 29.7 months (95 % CI 26.6-32.9) compared with 15.6 months (95 % CI 13.6-17.6) with LNR of ≥0.36 (P < .001). On multivariate analyses, no chemotherapy (HR 2.36 [2.0-2.79]), not having metastasectomy (HR 1.94 [1.63-2.32]), LNR ≥0.36 (HR 1.59 [1.38-1.84]). nodal status (HR 1.34 [1.14-1.59]), and T status (HR 1.23 [1.07-1.40]) were correlated with survival. Test for interaction was positive for LNR and high-grade cancer (HR 1.51 [1.10-2.10]). CONCLUSIONS Our results suggest that nodal status and LNR are important prognostic factors independent of chemotherapy and metastasectomy in stage IV CRC patients.
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Affiliation(s)
- Shahid Ahmed
- Saskatchewan Cancer Agency, Saskatoon, SK, Canada. .,Department of Oncology, University of Saskatchewan, Saskatoon, SK, Canada. .,Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada.
| | - Anne Leis
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada
| | | | - Anthony Fields
- Department of Oncology, University of Alberta, Edmonton, AB, Canada
| | - Adnan Zaidi
- Saskatchewan Cancer Agency, Saskatoon, SK, Canada.,Department of Oncology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Tahir Abbas
- Saskatchewan Cancer Agency, Saskatoon, SK, Canada.,Department of Oncology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Duc Le
- Saskatchewan Cancer Agency, Saskatoon, SK, Canada.,Department of Oncology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Bruce Reeder
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Punam Pahwa
- Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, SK, Canada
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Li ZM, Peng YF, Du CZ, Gu J. Colon cancer with unresectable synchronous metastases: the AAAP scoring system for predicting the outcome after primary tumour resection. Colorectal Dis 2016; 18:255-63. [PMID: 26400111 DOI: 10.1111/codi.13123] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 07/05/2015] [Indexed: 12/22/2022]
Abstract
AIM The aim of this study was to develop a prognostic scoring system to predict the outcome of patients with unresectable metastatic colon cancer who received primary colon tumour resection. METHOD Patients with confirmed metastatic colon cancer treated at the Peking University Cancer Hospital between 2003 and 2012 were reviewed retrospectively. The correlation of clinicopathological factors with overall survival was analysed using the Kaplan-Meier method and the log-rank test. Independent prognostic factors were identified using a Cox proportional hazards regression model and were then combined to form a prognostic scoring system. RESULTS A total of 110 eligible patients were included in the study. The median survival time was 10.4 months and the 2-year overall survival (OS) rate was 21.8%. Age over 70 years, an alkaline phosphatase (ALP) level over 160 IU/l, ascites, a platelet/lymphocyte ratio (PLR) above 162 and no postoperative therapy were independently associated with a shorter OS in multivariate analysis. Age, ALP, ascites and PLR were subsequently combined to form the so-called AAAP scoring system. Patients were classified into high, medium and low risk groups according to the score obtained. There were significant differences in OS between each group (P < 0.001). CONCLUSION Age, ALP, ascites, PLR and postoperative therapy were independent prognostic factors for survival of patients with metastatic colonic cancer who underwent primary tumour resection. The AAAP scoring system may be a useful tool for surgical decision making.
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Affiliation(s)
- Z M Li
- Department of Colorectal Surgery, Peking University Cancer Hospital and Institute, Beijing, China
| | - Y F Peng
- Department of Colorectal Surgery, Peking University Cancer Hospital and Institute, Beijing, China
| | - C Z Du
- Department of Colorectal Surgery, Peking University Cancer Hospital and Institute, Beijing, China
| | - J Gu
- Department of Colorectal Surgery, Peking University Cancer Hospital and Institute, Beijing, China
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Katsanos AH, Parissis J, Frogoudaki A, Vrettou AR, Ikonomidis I, Paraskevaidis I, Triantafyllou N, Kargiotis O, Voumvourakis K, Alexandrov AV, Tsivgoulis G. Heart failure and the risk of ischemic stroke recurrence: A systematic review and meta-analysis. J Neurol Sci 2016; 362:182-7. [DOI: 10.1016/j.jns.2016.01.053] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 01/14/2016] [Accepted: 01/25/2016] [Indexed: 01/14/2023]
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Abstract
BACKGROUND The benefits of primary tumor resection in metastatic disease remains a matter of debate. Existing data are almost exclusively limited to results from retrospective analyses. Data from prospective, randomized trials are currently not available. AIM The results from two prospective observational studies involving gastric and rectal cancer patients are presented and discussed in the context of the available literature. METHOD Based on data collected within the prospective quality assurance studies on gastric and rectal cancer conducted by the Institute for Quality Assurance in Surgery at Otto von Guericke University, Magdeburg, Germany, the long-term outcome after palliative primary tumor resection in patients with International Union Against Cancer (UICC) stage IV rectal cancer (2005-2008, n = 2046) and metastatic gastric cancer (2007-2009, n = 687) was analyzed and compared to published data. RESULTS The median survival time following palliative primary tumor resection of UICC stage IV rectal cancer in the patients analyzed was 20 months. In patients with hepatic metastases undergoing metastasectomy the median survival was 38 months. This increased to 58 months for patients with lymph node negative primary tumors. In metastatic gastric cancer patients undergoing palliative (R2) gastric resection and also patients not undergoing surgery showed a prognostic benefit from palliative chemotherapy; however, the median survival time was significantly prolonged if palliative chemotherapy was preceded by resection of the primary tumor (11 versus 7 months, p < 0.001). DISCUSSION Together with previously published data, the results from the two observational studies on rectal and gastric cancer presented here suggest a prognostic benefit from palliative resection of the primary tumor in metastatic disease.
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Wilkinson KJ, Chua W, Ng W, Roohullah A. Management of asymptomatic primary tumours in stage IV colorectal cancer: Review of outcomes. World J Gastrointest Oncol 2015; 7:513-523. [PMID: 26691885 PMCID: PMC4678398 DOI: 10.4251/wjgo.v7.i12.513] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Revised: 09/23/2015] [Accepted: 11/04/2015] [Indexed: 02/05/2023] Open
Abstract
AIM: To compare outcomes for patients presenting with stage IV colorectal cancer and an asymptomatic primary tumour, undergoing primary tumour resection (PTR) plus palliative chemotherapy vs primary chemotherapy up-front.
METHODS: A literature search was conducted using MEDLINE and EMBASE. The primary outcome was overall survival. Secondary outcomes included perioperative mortality, morbidity and delayed surgical intervention rates in patients undergoing PTR and subsequent complication rates in patients with an un-resected primary tumour. Tertiary outcomes included impact on systemic treatment and identification of prognostic factors relevant for survival in this cohort.
RESULTS: Twenty non-randomised studies met the inclusion criteria. Eleven studies included comparative overall survival data. Three studies showed an overall survival advantage for PTR, 7 studies showed no statistically significant advantage, and 1 study showed a significant worsening in survival in the surgical group. The perioperative mortality rate ranged from 0% to 8.5%, and post-operative morbidity rate from 10% to 35%, mainly minor complications that did not preclude subsequent chemotherapy. The rate of delayed primary-tumour related symptoms, most commonly obstruction, in patients with an un-resected primary tumour ranged from 3% to 46%. The strongest independent poor prognostic factor was extensive hepatic metastases, in addition to poor performance status, M1b stage and non-use of modern chemotherapy agents.
CONCLUSION: Based on the current literature, both PTR and up front chemotherapy appear appropriate initial management strategies, with a trend towards an overall survival advantage with PTR. The procedure has a low post-operative mortality, and most complications are transient and minor. The results of recruiting randomised trials are eagerly anticipated.
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Xu H, Xia Z, Jia X, Chen K, Li D, Dai Y, Tao M, Mao Y. Primary Tumor Resection Is Associated with Improved Survival in Stage IV Colorectal Cancer: An Instrumental Variable Analysis. Sci Rep 2015; 5:16516. [PMID: 26563729 PMCID: PMC4643284 DOI: 10.1038/srep16516] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/12/2015] [Indexed: 12/13/2022] Open
Abstract
Primary tumor resection (PTR) is recommended for patients with unresectable stage IV colorectal cancer (CRC) who present with symptoms related to their primary tumor. However, the survival benefit of PTR for asymptomatic patients is controversial. We investigated the change in PTR rates and the contribution of PTR to survival in patients with unresectable stage IV CRC over the past two decades in the United States. Clinicopathological factors and long-term survival were compared for 44 514 patients diagnosed with unresectable stage IV CRC from January 1, 1988, through December 31, 2010, who had or had not undergone PTR. Multivariable Cox regression and the instrumental variable method were used to identify independent factors for survival. Of the 44 514 patients with unresectable stage IV CRC, 27 931 (62.7%) had undergone PTR. The annual rate of PTR decreased from 74.4% to 50.2% diagnosed in 1988 and 2010, and the median overall survival increased for both PTR and non-PTR patients. Instrumental variable analyses revealed that PTR was associated with better overall, cancer-specific, and other-cause survival of patients with unresectable stage IV CRC.
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Affiliation(s)
- Hong Xu
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Zuguang Xia
- Department of Medical Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Xiaoyan Jia
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Kai Chen
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Dapeng Li
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yun Dai
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Min Tao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yixiang Mao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.,Department of Medical Oncology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Turner N, Tran B, Tran PV, Sinnathamby M, Wong HL, Jones I, Croxford M, Desai J, Tie J, Field KM, Kosmider S, Bae S, Gibbs P. Primary Tumor Resection in Patients With Metastatic Colorectal Cancer Is Associated With Reversal of Systemic Inflammation and Improved Survival. Clin Colorectal Cancer 2015; 14:185-91. [DOI: 10.1016/j.clcc.2015.02.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 02/17/2015] [Accepted: 02/26/2015] [Indexed: 12/31/2022]
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Cohen JM, Beddaoui M, Kramer MS, Platt RW, Basso O, Kahn SR. Maternal Antioxidant Levels in Pregnancy and Risk of Preeclampsia and Small for Gestational Age Birth: A Systematic Review and Meta-Analysis. PLoS One 2015; 10:e0135192. [PMID: 26247870 PMCID: PMC4527773 DOI: 10.1371/journal.pone.0135192] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 07/19/2015] [Indexed: 02/03/2023] Open
Abstract
Background Oxidative stress in preeclampsia and small for gestational age (SGA) birth suggests antioxidant supplementation could prevent these conditions. However, it remains unclear whether maternal antioxidant levels are systematically lower in these pregnancies. Objective To conduct a systematic review of the association between maternal antioxidant levels during pregnancy and preeclampsia or SGA. Methods We searched PubMed, Embase, and several other databases from 1970–2013 for observational studies that measured maternal blood levels of non-enzymatic antioxidants (vitamins A, C, E, and carotenoids) during pregnancy or within 72 hours of delivery. The entire review process was done in duplicate. Study quality was assessed using the Newcastle-Ottawa Scale and additional questions. We pooled the standardized mean difference (SMD) across studies, stratified by outcome and pregnancy trimester, and investigated heterogeneity using meta-regression. Results We reviewed 1,882 unique citations and 64 studies were included. Most studies were small with important risk of bias. Among studies that addressed preeclampsia (n = 58) and SGA (n = 9), 16% and 66%, respectively, measured levels prior to diagnosis. The SMDs for vitamins A, C, and E were significantly negative for overall preeclampsia, but not for mild or severe preeclampsia subtypes. Significant heterogeneity was observed in all meta-analyses and most could not be explained. Evidence for lower carotenoid antioxidants in preeclampsia and SGA was limited and inconclusive. Publication bias appears likely. Conclusions Small, low-quality studies limit conclusions that can be drawn from the available literature. Observational studies inconsistently show that vitamins C and E or other antioxidants are lower in women who develop preeclampsia or SGA. Reverse causality remains a possible explanation for associations observed. New clinical trials are not warranted in light of this evidence; however, additional rigorous observational studies measuring antioxidant levels before clinical detection of preeclampsia and SGA may clarify whether levels are altered at a causally-relevant time of pregnancy.
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Affiliation(s)
- Jacqueline M. Cohen
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
- * E-mail:
| | - Margaret Beddaoui
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| | - Michael S. Kramer
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada
| | - Robert W. Platt
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada
| | - Olga Basso
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
- Department of Obstetrics and Gynecology, McGill University, Montreal, Quebec, Canada
| | - Susan R. Kahn
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
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Ahmed S, Fields A, Pahwa P, Chandra-Kanthan S, Zaidi A, Le D, Haider K, Reeder B, Leis A. Surgical Resection of Primary Tumor in Asymptomatic or Minimally Symptomatic Patients With Stage IV Colorectal Cancer: A Canadian Province Experience. Clin Colorectal Cancer 2015; 14:e41-7. [PMID: 26140732 DOI: 10.1016/j.clcc.2015.05.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 05/29/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Surgical resection of the primary tumor in patients with stage IV colorectal cancer (CRC) remains controversial. Survival benefit reported in the literature has been attributed to the selection of younger and healthier patients with good performance status. We have recently reported that resection of the primary tumor improved survival of patients with stage IV CRC. In this study we examined survival benefit of surgery in patients with asymptomatic or minimally symptomatic primary tumor. PATIENTS AND METHODS A cohort of patients with stage IV CRC and asymptomatic or minimally symptomatic primary tumor, who were diagnosed during the period of 1992 to 2005, in the province of Saskatchewan Canada, was evaluated. The Kaplan-Meier method was used to determine survival. A multivariate Cox proportional hazard regression analysis was performed to determine prognostic importance of resection of primary tumor. A test for interaction was performed for resection of primary tumor and other important clinicopathological variables. RESULTS A total of 834 patients with a median age of 70 years (range, 22-93) and male:female ratio of 58:42 were identified. Among them 521 (63%) patients underwent surgery and 361 (43.3%) received chemotherapy. Patients who underwent surgery and received any chemotherapy had a median overall survival of 19.7 months (95% confidence interval [CI], 16.9-22.6) compared with 8.4 months (95% CI, 6.9-10.0) if they did not have surgery (P < .0001). In multivariate analysis, 5-fluorouracil-based chemotherapy (hazard ratio [HR], 0.43; 95% CI, 0.36-0.53), surgical resection of the primary tumor (HR, 0.47; 95% CI, 0.39-0.57), metastasectomy (HR, 0.48; 95% CI, 0.38-0.62), and second-line chemotherapy (HR, 0.72; 95% CI, 0.58-0.92) were correlated with superior survival. A test for interaction between ≥ 1 metastatic sites and surgery was significant, which suggests a larger benefit of surgery in patients with stage IVA disease. CONCLUSION Results of this large population-based cohort study suggest that resection of the primary tumor in asymptomatic or minimally symptomatic patients with stage IV CRC improved survival independent of other prognostic variables. The benefit was more pronounced in stage IVA disease.
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Affiliation(s)
- Shahid Ahmed
- Department of Oncology, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada; Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
| | - Anthony Fields
- Department of Oncology, University of Alberta, Edmonton, Alberta, Canada
| | - Punam Pahwa
- Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | | | - Adnan Zaidi
- Department of Oncology, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada; Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Duc Le
- Department of Oncology, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada; Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Kamal Haider
- Department of Oncology, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada; Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Bruce Reeder
- Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Anne Leis
- Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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Kim NK. Paradigm Shift in the Treatment of Elderly Patients With Unresectable Stage IV Colorectal Cancer. Ann Coloproctol 2014; 30:155-6. [PMID: 25210680 PMCID: PMC4155130 DOI: 10.3393/ac.2014.30.4.155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Nam Kyu Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
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Ahmed S, Johnson K, Ahmed O, Iqbal N. Advances in the management of colorectal cancer: from biology to treatment. Int J Colorectal Dis 2014; 29:1031-42. [PMID: 24953060 DOI: 10.1007/s00384-014-1928-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/12/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND Colorectal cancer (CRC) is the third most common malignant neoplasm worldwide and the fourth leading cause of cancer-related deaths. This article reviews the epidemiology, risk factors, pathogenesis, and prognosis of CRC with special emphasis on advances in the management of CRC over the past decade. METHODS A review of the published English literature was conducted using the search engines PubMed, Medline, EMBASE, and Google Scholar. A total of 127 relevant publications were identified for further review. RESULTS Most CRC are sporadic and are due to genetic instability and multiple somatic mutations. Approximately 80% of cancers are diagnosed at the early stage and are curable. The pathologic stage at presentation is the most important predictor of outcome after resection of early stage cancer. Surgery is the primary treatment modality for localized CRC. Advances in (neo)adjuvant chemotherapy and radiation have reduced the disease recurrence and increased survival in high risk diseases. Although recent advancements in combination chemotherapy and target agents have increased the survival of incurable CRC, it is remarkable that only selected patients with advanced CRC can be cured with multimodality therapy. CONCLUSION Over the past decade, there has seen substantial progress in our understanding of and in the management of CRC.
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Kube R, Mroczkowski P. [Metastasized colonic cancer. When are there no indications for primary resection?]. Chirurg 2014; 86:148-53. [PMID: 24969343 DOI: 10.1007/s00104-014-2765-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The determination of an optimal treatment protocol for colonic cancer with synchronous incurable metastases remains a challenge, especially if the primary tumor is asymptomatic. Available data on whether resection of the primary tumor means a benefit or a danger to the patient are limited and inhomogeneous. A survival benefit could be shown only in retrospective studies with a bias against primary chemotherapy. The important question of the quality of life (QOL) remains completely unanswered in this respect. There are numerous groups and guidelines in favor of a primary palliative chemotherapy for these patients, possibly intensified by antibodies. The results of the currently ongoing randomized multicenter SYNCHRONUS study will deliver objective data facilitating the decision-making process with respect to the indications for resection of the primary tumor or primary chemotherapy.
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Affiliation(s)
- R Kube
- Klinik für Chirurgie, Carl-Thiem-Klinikum Cottbus, Thiemstr. 111, 03048, Cottbus, Deutschland,
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Ahmed S, Leis A, Fields A, Chandra-Kanthan S, Haider K, Alvi R, Reeder B, Pahwa P. Survival impact of surgical resection of primary tumor in patients with stage IV colorectal cancer: results from a large population-based cohort study. Cancer 2013; 120:683-91. [PMID: 24222180 DOI: 10.1002/cncr.28464] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 10/01/2013] [Accepted: 10/04/2013] [Indexed: 12/31/2022]
Abstract
BACKGROUND Currently, there is very low-quality evidence available regarding benefit of surgical resection of the primary tumor (SRPT), in patients with stage IV colorectal cancer (CRC). In the absence of randomization, the reported benefit may reflect selection of younger and healthier patients with good performance status. A large population-based cohort study was undertaken to determine the survival benefit of SRPT in advanced CRC by eliminating various biases reported in the literature. METHODS A retrospective cohort study involving patients with stage IV CRC, diagnosed between 1992 and 2005, in the province of Saskatchewan, Canada. Survival was estimated by using the Kaplan-Meier method. Survival distribution was compared by log-rank test. Cox proportional multivariate regression analysis was performed to determine survival benefit of SRPT by controlling other prognostic variables. RESULTS A total of 1378 eligible patients were identified. Their median age was 70 years (range, 22-98 years) and male:female ratio was 1.3:1; 944 (68.5%) of them underwent SRPT. Among 1378 patients, 42.3% received chemotherapy and 19.1% received second-generation therapy. Patients who underwent SRPT and received chemotherapy had median overall survival of 18.3 months (95% confidence interval [CI] = 16.6-20 months) compared with 8.4 months (95% CI = 7.1-9.7 months) if they were treated with chemotherapy alone (P < .0001). Cox proportional analysis revealed that use of chemotherapy (hazard ratio [HR] = 0.47, 95% CI = 0.41-0.54), SRPT (HR = 0.49, 95% CI = 0.41-0.58), second-line chemotherapy (HR = 0.47, 95% CI = 0.45-0.64), and metastasectomy (HR = 0.54, 95% CI = 0.45-0.64) were correlated with superior survival. CONCLUSIONS SRPT improves survival in patients with stage IV CRC, independent of other prognostic variables including age, performance status, comorbid illness and chemotherapy.
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Affiliation(s)
- Shahid Ahmed
- Saskatchewan Cancer Agency, Regina, Canada; Department of Oncology, University of Saskatchewan, Saskatoon, Canada; Department of Community Health and Epidemiology, University of Saskatchewan, Saskatoon, Canada
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