Purpose To analyze the clinical and CT features of hepatoid adenocarcinoma of the stomach.Materials and Methods A total of 38 patients with hepatoid adenocarcinoma of the stomach from September 2012 to April 2023 in the First Affiliated Hospital of Soochow University were retrospectively reviewed,and the clinicopathological data,laboratory examinations,and CT characteristics of the tumor size,morphology,density,border,enhancement pattern,metastasis and invasion were recorded and analyzed.Results Among 38 patients,there were 24 cases with elevated serum alpha-fetoprotein levels and 32 cases with positive immunohistochemical alpha-fetoprotein expression.The maximum diameter was 2.38-11.95 cm in the portal phase,with the median(interquartile range)of 5.200(3.365,7.215)cm.On contrast-enhanced CT scan,there were 23 cases with ulceration,20 cases with internal necrosis,25 cases with peripheral invasion,14 cases with liver metastases,and 5 cases with carcinoma emboli in the portal system.Conclusion Hepatoid adenocarcinoma of the stomach is a rare tumor.Serum alpha-fetoprotein often increases.Size of the tumor is often large on contrast-enhanced CT scan,necrosis,progressive or continuous enhancement,metastasis and invasion of the portal vein are commonly manifested.Understanding these characteristics is helpful to improve the diagnostic level.
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