| Literature DB >> 32582513 |
Suguru Hirose1, Toshikazu Moriwaki1, Masamichi Yamaura1, Daisuke Suganuma1, Hiroki Tajima1, Masashi Sato1, Chiaki Enami1, Takeshi Yamada1, Yoshiyuki Yamamoto1, Noriaki Sakamoto2, Ichinosuke Hyodo1.
Abstract
A 63-year-old man had advanced poorly differentiated gastric adenocarcinoma with para-aortic lymph node metastases. No HER2 expression was observed in four endoscopic biopsies from the primary tumor. Tumors shrunk after S-1 with cisplatin treatment, and he underwent simple gastrectomy due to stenosis. Interestingly, HER2 diffusely overexpressed in the resected surgical specimen. His disease was stable with trastuzumab-containing therapy for 6.4 months. This case may suggest a selection of HER2-positive cells that were insensitive to the chemotherapy, and further study is needed for the change of intratumoral HER2 heterogeneity after chemotherapy. © The Japan Society of Clinical Oncology 2020.Entities:
Keywords: Biopsy; Epidermal growth factor receptor-2; Gastric cancer; Heterogeneity; Trastuzumab
Year: 2020 PMID: 32582513 PMCID: PMC7297895 DOI: 10.1007/s13691-020-00412-8
Source DB: PubMed Journal: Int Cancer Conf J ISSN: 2192-3183