title: Proton magnetic resonance spectroscopy findings of a sacrococcygeal schwannoma.
abstract: Schwannoma is tumor of peripheral nerves, originating from Schwann cells. It is a rare nerve sheath tumor, which frequently occurs in the intracranial acoustic nerve and spinal nerves. We report on a 28-year-old woman who suffered from a large pelvic mass that was diagnosed to be sacrococcygeal schwannoma. The features of proton magnetic resonance spectroscopy (MRS) study are discussed. The magnetic resonance imaging instrument was a 1.5 T, Gyroscan Intera with a body coil as a radiofrequency transmitter and a signal receiver. T2-weighted images were obtained under the following conditions-turbo spin echo (TSE) T2: turbo spin echo repeat time (TR) = 4500 msec, echo time (TE) = 96 msec. Single voxel MRS was performed by the point-resolved spectroscopy technique with a long TE (136 msec). MRS measurement was performed on two different parts of the tumor. As well as strongly elevated choline and lipid signals, the tumor spectrum showed increased N-acetylaspartate resonances. MRS can be used effectively in the preoperative diagnosis of retroperitoneal and pelvic masses, which demonstrate unusual clinical features.
authors.affiliation: Department of Obstetrics and Gynecology, Medical Faculty, Inonu University, Malatya, Turkey. shascalik@inonu.edu.tr
authors.forename: S
authors.initials: S
authors.lastname: Hascalik
authors.forename: O
authors.initials: O
authors.lastname: Celik
authors.forename: G
authors.initials: G
authors.lastname: Erdem
authors.forename: C
authors.initials: C
authors.lastname: Ara
authors.forename: H
authors.initials: H
authors.lastname: Kirimlioglu
mesh_terms: D000328:Adult; D001224:Aspartic Acid; D002794:Choline / Q000032:analysis; D005260:Female; D013509:Gynecologic Surgical Procedures; D006801:Humans; D008055:Lipids / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D018317:Nerve Sheath Neoplasms / Q000737:chemistry* / Q000175:diagnosis* / Q000601:surgery; D009442:Neurilemmoma / Q000737:chemistry* / Q000175:diagnosis* / Q000601:surgery; D011522:Protons; D012445:Sacrococcygeal Region
chemical_list: D008055:Lipids; D011522:Protons; D001224:Aspartic Acid; D002794:Choline