Simultaneous strumal ovarii and lymphoma with emphasis on the diagnostic usefulness of immunohistochemical stains.

Strumal ovarii has been rarely associated with other tumors, such as carcinoid tumor, carcinoma, and primary ovarian malignant lymphoma. We report the coexistence of a strumal ovarii and ovarian involvement by malignant lymphoma in a 70-year-old woman. The tumors were detected 10 years following exposure to ionizing radiation during the Chernobyl nuclear tragedy.