RESUMO
Actinomycosis is a chronic suppurative and granulomatous disease caused by actinomyces species and caracterized by sulfur granule formation which frequently discharged via draining sinus. Actinomyces can affect cervicofacial, pulmonary, abdominal and pelvic area. Most of abdominal actinomycosis is developed after abdominal operation, trauma or inflammatory bowel disease and it must be differentiated from colon cancer, amaeboma, chronic appendicitis or intestinal tuberculosis. We report a case of abdominal actinomycosis, preoperatively impressed as colon carcinoma, which was diagnosed by histological study of the operative specimen. Adequate surgical excision and drainage procedure followed by administration of massive dose of penicilline for weeks. In this case we noted secondary abscess formation after surgery of primary disease. Herein we present our experience with reviewed literatures.