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KMID : 0942820020010020161
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Journal of Korean Brain Tumor Society
2002 Volume.1 No. 2 p.161 ~ p.165
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A Case of Recurrent Subependymoma with Subependymal Seeding
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Seol Ho-Jun
Hwang Sung-Kyun
Choi Yoon-La
Chi Je-G.
Jung Hee-Won
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Abstract
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Subependymoma is a rare, slow growing, rarely recurrent tumor. We report a case of recurrent subependymoma with subependymal seeding. An intraventricular tumor in the left temporal horn was detected in a 48-year-old female who presented with a 4-year history of dizziness and memory disturbance. Following near total surgical resection, a tumor diagnosis of subependymoma was confirmed by scattered clusters of isomorphic nuclei embedded in a dense fibrillary matrix of glial cell processes. Twenty six months after surgery, follow-up(F/U) magnetic resonance(MR) imaging revealed tumor recurrence in the previous site which necessitated linear accelerator radiosurgery(LINAC). A further 21 months later, F/U MR imaging showed recurrent, multiple, enhanced, nodular lesions in the enlarged left lateral ventricle for which the patient underwent reoperation. Radiological and operative findings revealed local relapse with subependyma
seeding. The pathological finding was similar to that of the previous tumor and compatible with subependymoma. Immunohistochemical studies revealed that glial fibrillary acidic protein(GFAP) was positive and CD-99 was negative. The patient underwent radiation therapy for the residual tumor. This case history suggests that symptomatic residual tumors require close observation even though the clinical course of subependymoma is usually benign.
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KEYWORD
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Recurrent subependymoma, Subependymal seeding
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