A 83-year-old woman with hematemesis was admitted to our hospital . Emergency endoscopic examination showed multiple ulcerations with bleeding in the duodenum and the proximal jejunum. Enhanced abdominal CT scan showing wall thickness of proximal jejunum. Histopathological studies showed proliferation of atypical lymphocytes. Immunohistohemical staining of the tumor cells revealed CD3 (+) , CD4 (-) , CD8 (+) , CD20 (-) , and CD56 (+) . From these findings, enteropathy associated T-cell lymphoma (EATL) was diagnosed. Because she had dementia and poor ADL, she did not receive an active treatment including chemotherapy and died on the 59th hospital day. We report a rare case of primary T-cell lymphoma of the duodenum and the proximal jejunum.
