PMID- 33145329 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220830 IS - 2305-5839 (Print) IS - 2305-5847 (Electronic) IS - 2305-5839 (Linking) VI - 8 IP - 17 DP - 2020 Sep TI - Does tumor profile in gastric and gastroesophageal (GE) junction cancer justify off-label use of targeted therapy?-a narrative review. PG - 1110 LID - 10.21037/atm-20-3510 [doi] LID - 1110 AB - Despite significant therapeutic progress, gastric cancer remains among the most deadly forms of cancer encountered in clinical practice, and this remains true even in the context of declining incidence. Outcomes in advanced disease remain poor and therapy is rarely curative in this setting. As our understanding of tumor profile gains sophistication, a growing interest in targeted therapies and moreover the use of tumor profile to inform these therapies has developed in the hopes of altering nearly uniformly poor outcomes. A wide and growing array of molecular targets have been identified in the recent past. Targets of potential clinical interest include human epidermal growth factor receptor-2 (HER2), epidermal growth factor receptor (EGFR), poly(ADP-ribose) polymerase (PARP), mammalian target of rapamycin (mTOR), c-MET, and fibroblast growth factor receptor (FGFR). This advanced molecular understanding has been increasingly used to justify the off-label usage of targeted therapies, though the efficacy of this approach warrants careful consideration. While targeted agents have demonstrated efficacy across a wide range of malignancies, even with molecular profiling data, efficacy is not assured. It will also be demonstrated that even within the same malignancy, what holds true in the metastatic setting does not necessarily apply to the adjuvant or neoadjuvant setting. This review will assess the current evidence for the use of targeted therapies utilizing these biomarkers in the context of gastric and gastroesophageal (GE) junction cancers. CI - 2020 Annals of Translational Medicine. All rights reserved. FAU - Del Prete, Christopher AU - Del Prete C AD - Division of Hematology Oncology, Department of Internal Medicine, Warren-Alpert School of Medicine at Brown University/Lifespan Health, Providence, RI, USA. FAU - Muthiah, Arun AU - Muthiah A AD - Department of Internal Medicine, Warren-Alpert School of Medicine at Brown University/Lifespan Health, Providence, RI, USA. FAU - Almhanna, Khaldoun AU - Almhanna K AD - Division of Hematology Oncology, Department of Internal Medicine, Warren-Alpert School of Medicine at Brown University/Lifespan Health, Providence, RI, USA. LA - eng PT - Journal Article PT - Review PL - China TA - Ann Transl Med JT - Annals of translational medicine JID - 101617978 PMC - PMC7575969 OTO - NOTNLM OT - Gastric cancer (GC) OT - epidermal growth factor receptor (EGFR) OT - human epidermal growth factor receptor-2 (HER2) OT - poly(ADP-ribose) polymerase (PARP) OT - targeted therapy OT - tyrosine kinase inhibitor OT - vascular endothelial growth factor (VEGF) COIS- Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at http://dx.doi.org/10.21037/atm-20-3510). The series "Gastroesophageal Cancer 2020" was commissioned by the editorial office without any funding or sponsorship. KA served as the unpaid Guest Editor of the series and serves as an unpaid editorial board member of Annals of Translational Medicine from Nov 2019 to Oct 2021. The other authors have no other conflicts of interest to declare. EDAT- 2020/11/05 06:00 MHDA- 2020/11/05 06:01 PMCR- 2020/09/01 CRDT- 2020/11/04 05:47 PHST- 2020/11/04 05:47 [entrez] PHST- 2020/11/05 06:00 [pubmed] PHST- 2020/11/05 06:01 [medline] PHST- 2020/09/01 00:00 [pmc-release] AID - atm-08-17-1110 [pii] AID - 10.21037/atm-20-3510 [doi] PST - ppublish SO - Ann Transl Med. 2020 Sep;8(17):1110. doi: 10.21037/atm-20-3510.