A rare case of primary urachal actinomycosis mimicking malignancy.

Primary actinomycosis occurring in urachal remnants is rarely documented in literature and may mislead the clinicians to diagnose urachal carcinoma. A 50-year-old man came with complaints of lower abdominal pain, dysuria, and dribbling of urine for 2 months. A vague mass of 7 cm was palpable in the suprapubic region.