Korean J Urol.  2007 Jun;48(6):663-666. 10.4111/kju.2007.48.6.663.

Pelvic Schwannoma Causing Recurrent Acute Urinary Retention

• Kim BS
• Son YW
• Lee SJ
• Jang SH
• Park YW
• Oh YH
• Choi HY
• Moon HS

• KMID: 1885552
• DOI: http://doi.org/10.4111/kju.2007.48.6.663

Abstract

Schwannoma is a tumor that arises from neural sheath Schwann cells of peripheral nerves. Schwannoma is mostly solitary, except when it occurs in association with Von Recklinghausen's disease. Solitary schwannoma can occur in association with a nerve anywhere within the body, but rarely occurs in the pelvis. Microscopically, the tumors can be divided into hypercellular bundles of spindle-shaped cells (Antoni A area) and areas of lower cellularity, with loose myxomatous arrangement of cells and fibers (Antoni B area). Complete resection of pelvic schwannoma is a curative treatment. We report a case of benign presacral cystic schwannoma that caused recurrent acute urinary retention in a 79-year-old woman, along with a review of the literature.

Keyword

Schwannoma; Pelvis

MeSH Terms

Aged
Female
Humans
Neurilemmoma*
Neurofibromatosis 1
Pelvis
Peripheral Nerves
Schwann Cells
Urinary Retention*

Figure

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  Fig. 1. (A) Axial contrast-enhanced computed tomography through the pelvis shows a 10x10cm-sized, well-capsulated cystic mass compressing the bladder and rectum. (B) Sagittal T2-weighted image reveals a multi-septated heterogenous hyperintense mass of the pelvic cavity located on the anterior side of the sacrum.

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  Fig. 2. (A) A large, well-encapsulated cystic mass and a smaller mass attached to the larger mass, measuring 12x11cm and 4.0x3.5cm in diameter, respectively. (B) Cut surface of the larger mass reveals a multilocular cystic mass with hemorrhagic areas and fibrinous materials attached to the inner surface, and the smaller mass reveals an encapsulated solid mass with a yellow-grey and white appearance.

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  Fig. 3. (A) Benign spindle cell tumor with perivascular hyalinization composed of hypercellular and hypocellular areas (H&E, x100). (B) Immunohistochemistry for S-100 protein shows diffuse positive reactions to tumor cells.

Reference

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