Proton magnetic resonance spectroscopy findings of a sacrococcygeal schwannoma

Hascalik S., Celik O., Erdem G., Ara C., Kirimlioglu H.

INTERNATIONAL JOURNAL OF GYNECOLOGICAL CANCER, vol.16, pp.344-348, 2006 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 16
  • Publication Date: 2006
  • Doi Number: 10.1111/j.1525-1438.2006.00224.x
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.344-348
  • Keywords: magnetic resonance spectroscopy, sacrococcygeal, schwannoma, MR SPECTROSCOPY, BRAIN-TUMORS, N-ACETYLASPARTATE, GLIOMAS


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 1.5T, 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.