A female patient who had been initially diagnosed with non‐Hodgkin's lymphoma (NHL) and achieved complete clinical remission with combined chemotherapy, developed overt adult T‐cell leukemia (ATL) after 9 yr of disease‐free survival. This is the first case of the development of ATL following the complete remission of NHL. Secondary malignant neoplasms are not well‐documented in patients previously diagnosed with Hodgkin's disease. Although there have been a few reports concerning the occurrence of secondary malginancy in patients with non‐Hodgkin's lymphoma (NHL), there has never been a documented case of ATL following long‐term survival from NHL. Here, we report a case of typical adult T‐cell leukemia (ATL) which occurred after 9 yr disease‐free su
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