[Hereditary spherocytosis associated with non-Hodgkin's lymphoma in the spleen].

A 60-year-old female was admitted complaining of anemia. We diagnosed her hereditary spherocytosis (HS) from spherocytosis and family history and found a tumor in her enlarged spleen. Splenectomy was performed and swollen paraaortic lymph nodes were found at laparotomy. The tumor in the spleen was diagnosed as Non-Hodgkin's lymphoma (follicular mixed type). After CHOP therapy she entered complete remission. Though the relationship between HS and malignant lymphoma was not clear, splenomegaly due to hemolysis inducing chronic stimulation might have resulted in malignant lymphoma.