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Effect of immune checkpoint inhibitors in patients with gastric hepatoid adenocarcinoma: a case report and literature review
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Effect of immune checkpoint inhibitors in patients with gastric hepatoid adenocarcinoma: a case report and literature review
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Journal Article
Effect of immune checkpoint inhibitors in patients with gastric hepatoid adenocarcinoma: a case report and literature review
2022
Overview
Gastric hepatoid adenocarcinoma (GHAC) is a highly aggressive histological subtype of gastric cancer (GC) with similar tissue morphology to hepatocellular carcinoma. GHAC frequently produces alpha-fetoprotein (AFP) and has a poor prognosis; however, standardized treatment remains elusive. We report a male patient in his early 60s with GHAC who received immunotherapy, and the curative effect was evaluated. He was admitted because of progressive fatigue and dizziness for 2 months. He had experienced spontaneous epigastric pain with muscular defense of the epigastrium and accompanying tenderness 1 year earlier and underwent radical gastrectomy. Immunohistochemistry showed that hepatocyte-specific marker (Hep) was highly-expressed, indicating probable GHAC. Additionally, imaging suggested GC recurrence or gastric stump cancer. Radioimmunoassay indicated an AFP level of >1210.00 µg/L, and liver biopsy was performed following abdominal contrast-enhanced computed tomography. Pathology showed a few hepatocytes and proliferative fibrous connective tissue. The patient received three cycles of chemotherapy, with no obvious improvement. The possibility of surgical treatment was excluded, and immunotherapy or palliative treatment was selected. He received 11 cycles of a programed death-1 (PD-1) monoclonal antibody, and the effect of treatment was satisfactory. The mechanism of action of immunotherapy in GHAC warrants further investigation.
Publisher
SAGE Publications,Sage Publications Ltd,SAGE Publishing
