Journal article
Metastatic Colorectal Cancers with Mismatch Repair Deficiency Result in Worse Survival Regardless of Peritoneal Metastases
Annals of surgical oncology, Vol.27(13), pp.5074-5083
12/01/2020
DOI: 10.1245/s10434-020-08733-x
PMCID: PMC9782694
PMID: 32583196
Abstract
Background Mismatch-repair deficiency (dMMR) predicts worse chemoresponsiveness but better survival in early-stage colorectal adenocarcinoma. This study examined metastatic colorectal and appendix cancers with and without peritoneal metastasis (PM) in the National Cancer Database (NCDB), hypothesizing that dMMR tumors show better survival. Methods Stage 4 colon, rectum, and appendix cancers (2010-2016) were identified in the NCDB (including goblet cell carcinoids, excluding neuroendocrine tumors). Stage 4 disease without liver, bone, brain, lung, or distant nodal metastases defined PM. Fisher's exact tests were used to compare proportions, and Kaplan-Meier analysis was used to evaluate survival. Results Of 130,125 stage 4 colon, rectum, and appendix cancers, 27,848 (21.4%) had PM. Appendix primary tumors had PM more commonly than colon or rectum cancer (83.6% vs. 20.6% and 12.1% of stage 4 cases;p < 0.0001). More PM patients had MMR testing than patients with other metastasis (OM) (21.4% vs. 16.1%), and testing increased from 9.6% in 2010 to 26.3% in 2016 (bothp < 0.0001). Among the PM patients, MMR testing was least common for appendix cancers (9.0%). When tested, PM patients more often had dMMR (22.9% [1122/4900] vs. 15.4% [2532/16,495] of OM patients;p < 0.0001). Colon primary tumor had dMMR most frequently (25.0% vs. 14.6% and 14.5% for rectal and appendix tumor;p < 0.0001). Most PM patients received chemotherapy (66.2%). Immunotherapy use increased over time (1.1% of PM diagnoses in 2010 vs. 20.8% in 2016). For MMR-tested stage 4 patients, dMMR correlated with worse survival (median OM, 19.7 vs. 23.9 months,p < 0.0001; median PM, 19.9 vs. 24.6 months,p = 0.035). Conclusions The NCDB showed dMMR predicting worse survival for stage 4 colorectal cancers with and without PM and dMMR existing in 14.5-25% of tested patients, suggesting that increased attention to MMR testing in stage 4 colorectal and appendix cancers can identify many patients who could potentially benefit from immunotherapy.
Details
- Title: Subtitle
- Metastatic Colorectal Cancers with Mismatch Repair Deficiency Result in Worse Survival Regardless of Peritoneal Metastases
- Creators
- Scott K. Sherman - Roy J. and Lucille A. Carver College of MedicineDarryl Schuitevoerder - University of ChicagoCarlos H. F. Chan - Roy J. and Lucille A. Carver College of MedicineKiran K. Turaga - University of Chicago
- Resource Type
- Journal article
- Publication Details
- Annals of surgical oncology, Vol.27(13), pp.5074-5083
- DOI
- 10.1245/s10434-020-08733-x
- PMID
- 32583196
- PMCID
- PMC9782694
- NLM abbreviation
- Ann Surg Oncol
- ISSN
- 1068-9265
- eISSN
- 1534-4681
- Publisher
- Springer Nature
- Number of pages
- 10
- Grant note
- CA078586 / NIH T32; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
- Language
- English
- Date published
- 12/01/2020
- Academic Unit
- Surgery; Radiation Oncology
- Record Identifier
- 9984313078302771
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