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Ang CSP, Shen JP, Hardy-Abeloos CJ, Huang JK, Ross JS, Miller VA, Jacobs MT, Chen IL, Xu D, Ali SM, Baumgartner J, Lowy A, Fanta P, Ideker T, Millis SZ, Harismendy O. Genomic Landscape of Appendiceal Neoplasms. JCO Precis Oncol 2018; 2:1700302. [PMID: 32913983 DOI: 10.1200/po.17.00302] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Purpose Appendiceal neoplasms are heterogeneous and are often treated with chemotherapy similarly to colorectal cancer (CRC). Genomic profiling was performed on 703 appendiceal cancer specimens to compare the mutation profiles of appendiceal subtypes to CRC and other cancers, with the ultimate aim to identify potential biomarkers and novel therapeutic targets. Methods Tumor specimens were submitted to a Clinical Laboratory Improvement Amendments-certified laboratory (Foundation Medicine, Cambridge, MA) for hybrid-capture-based sequencing of 3,769 exons from 315 cancer-related genes and 47 introns of 28 genes commonly rearranged in cancer. Interactions between genotype, histologic subtype, treatment, and overall survival (OS) were analyzed in a clinically annotated subset of 76 cases. Results There were five major histopathologic subtypes: mucinous adenocarcinomas (46%), adenocarcinomas (30%), goblet cell carcinoids (12%), pseudomyxoma peritonei (7.7%), and signet ring cell carcinomas (5.2%). KRAS (35% to 81%) and GNAS (8% to 72%) were the most frequent alterations in epithelial cancers; APC and TP53 mutations were significantly less frequent in appendiceal cancers relative to CRC. Low-grade and high-grade tumors were enriched for GNAS and TP53 mutations, respectively (both χ2 P < .001). GNAS and TP53 were mutually exclusive (Bonferroni corrected P < .001). Tumor grade and TP53 mutation status independently predicted OS. The mutation status of GNAS and TP53 strongly predicted OS (median, 37.1 months for TP53 mutant v 75.8 GNAS-TP53 wild type v 115.5 GNAS mutant; log-rank P = .0031) and performed as well as grade in risk stratifying patients. Conclusion Epithelial appendiceal cancers and goblet cell carcinoids show differences in KRAS and GNAS mutation frequencies and have mutation profiles distinct from CRC. This study highlights the benefit of performing molecular profiling on rare tumors to identify prognostic and predictive biomarkers and new therapeutic targets.
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Affiliation(s)
- Celina S-P Ang
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - John Paul Shen
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Camille J Hardy-Abeloos
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Justin K Huang
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Jeffrey S Ross
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Vincent A Miller
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Miriam T Jacobs
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Ingrid L Chen
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - David Xu
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Siraj M Ali
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Joel Baumgartner
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Andrew Lowy
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Paul Fanta
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Trey Ideker
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Sherri Z Millis
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
| | - Olivier Harismendy
- , , , , and , Mount Sinai Hospital, New York, NY; , , , , , , , , , and , University of California, San Diego, La Jolla, CA; , Albany Medical College, Albany, NY; , , and , Foundation Medicine, Cambridge, MA
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