title: [A case of a retroperitoneal schwannoma presenting as hypermetabolic mass in PET-CT].
abstract: Schwannoma is a benign neoplasm of the Schwann cells of the neural sheath. Most schwannomas occur in the head and neck, and extremities and rarely in the retroperitoneal space. The differentiation of a schwannoma from other malignant tumor or benign tumor is very difficult on a preoperative examination with ultrasonography, computed tomography or magnetic resonance imaging. Furthermore, the lesion with increased fluorodeoxyglucose uptake in PET-CT cannot exclude malignant tumor. Therefore, this lesion needs surgical excision and a histological examination with immunohistochemical staining. We report a case of schwannoma occuring in the retroperitoneal space that incidentally discovered by PET-CT for health-check up. Pathologic confirmation by laparoscopic excision was done.
authors.affiliation: Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon, Korea.
authors.forename: Pyung Gohn
authors.initials: PG
authors.lastname: Goh
authors.forename: Kwang Hun
authors.initials: KH
authors.lastname: Ko
authors.forename: Eui Sik
authors.initials: ES
authors.lastname: Kim
authors.forename: Yun Jeung
authors.initials: YJ
authors.lastname: Kim
authors.forename: Soo Youn
authors.initials: SY
authors.lastname: Lee
authors.forename: Hee Seok
authors.initials: HS
authors.lastname: Moon
authors.forename: Hyun Yong
authors.initials: HY
authors.lastname: Jeong
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D009442:Neurilemmoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D049268:Positron-Emission Tomography; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed
chemical_list: D019788:Fluorodeoxyglucose F18