title: A pomegranate heart.
abstract: Sacrococcygeal teratomas are common in infants while a buttock terotoma is extremely rare in adults. Herein we report a 30-year-old female complaining of left hip swelling and pain for 2 weeks. Ultrasonography demonstrated a subcutaneous cystic mass with multiple dense echo spots inside. MR showed a heart-shaped mass in the left buttock, with multiple "pomegranate seeds" inside, which showed hyperintensity on diffusion weighted imaging. The mass was resected and a buttock terotoma containing yellow sebum-like materials and hairs was confirmed pathologically. A thick walled cystic mass on CT or MR images, which contains multiple small solid nodules or fat, indicates the diagnosis of a terotoma. Timely diagnosis and complete resection bring good prognosis. Adequate follow-up is necessary.
authors.affiliation: Department of Radiology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu Province, China;
authors.forename: Jian
authors.initials: J
authors.lastname: He
authors.forename: Kefeng
authors.initials: K
authors.lastname: Zhou
authors.forename: Guochu
authors.initials: G
authors.lastname: Qin
authors.forename: Shizheng
authors.initials: S
authors.lastname: Zhang
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu