A 68-year-old woman was evaluated by her primary physician for swelling and pain in the right neck. Treatment with antibiotics failed to achieve any improvement. Two weeks later, she was hospitalized to the gastroenterology department because of liver dysfunction and pneumonia. Disseminated intravascular coagulation (DIC) was diagnosed, and protease inhibitor and steroid pulse therapy were started. She was transferred to our department for further evaluation the following day. Bone marrow examination revealed hemophagocytosis and infiltration of CD3-positive cells. Multiple masses were identified in the liver. Her prothrombin time was 35.7% of the standard value 17 days from disease onset, despite improvement of DIC. She was diagnosed with acute liver failure based on the Japanese diagnostic criteria. Her general condition worsened quickly, which prevented use of chemotherapy, and she died after a total course of 19 days. Autopsy revealed atypical lymphocytes in the liver. The diagnosis was peripheral T-cell lymphoma.
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