Primary urachal actinomycosis: A case report

摘要

Ultrasound showed a hypoechoic subabdominal mass pressed on bladder, with heterogeneous echotexture and few venous blood flow signals. Enhanced CT showed a 4.9 cm x 5.4 cm x 13.2 cm heterogeneously enhanced mass located in region of median umbilical ligament. Boundaries among mass, tissues around and bladder were unclear. Primary diagnosis of CT was urachal malignant neoplasm invading surrounding peritoneum (Fig. 1). PET- CT showed a hypermetabolic mass located in region of median umbilical ligament with unclear boundaries. Several mesenteric and retroperitoneal lymph nodes were a little hypermetabolic, biggest size of which was 0.9 cm. Spleen and bone marrow were hypermetabolic. Primary diagnosis of PET-CT was also urachal malignant neoplasm (Fig. S1). Cystoscopy found a mass in vertex of bladder, pressing from outside. The urothelium was intact and biopsy from surface of mass revealed chronic inflammation.