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A case of acute liver failure due to aggressive natural killer-cell leukemia with a rapid course.

An 87-year-old man consulted a former doctor with a complaint of black stool and was admitted to hospital because of anemia and multiple gastric ulcers. The laboratory findings showed that his hepatobiliary enzyme levels and inflammatory response were elevated. Computed tomography showed hepatosplenomegaly and enlarged intra-abdominal lymph nodes. Two days later, he was transferred to our hospital due to deterioration of his liver function. Since he had low level of consciousness and his ammonia level was high, we diagnosed him with acute liver failure (ALF) with hepatic coma, and started on-line hemodiafiltration. As the cause of ALF, we suspected hepatic involvement of a hematologic tumor because of high lactate dehydrogenase and soluble interleukin-2 receptor levels and large abnormal lymphocyte-like cells in the peripheral blood. Because of his poor general condition, bone marrow and other histological examinations were difficult, and he died on the third day of hospitalization. Pathological autopsy showed marked hepatosplenomegaly and the proliferation of large abnormal lymphocyte-like cells in the bone marrow, liver, spleen, and lymph nodes. Immunostaining revealed aggressive natural killer-cell leukemia (ANKL).We herein report a rare case of the development of ALF with coma due to ANKL with a review of the relevant literature.

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