Advanced actinomycosis involving urogenital organs simulating malignancy: a case report.

A long-standing and widely used intrauterine contraceptive device has been associated with actinomycotic pelvic inflammation. The stealthy and chronic nature of the disease progresses and occasionally infiltrates adjacent organs. The non-specific symptoms of the disease, solid invasive mass and lack of marked leukocytosis, often suggest a malignancy. We present a case of advanced pelvic actinomycosis involving urogenital organs which has not been reported before. The behaviors of the disease, which mimic malignancy and urogenital manifestation, pose difficulties in diagnosis and management.