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Case Reports
. 1993 Aug 1;72(3):850-5.
doi: 10.1002/1097-0142(19930801)72:3<850::aid-cncr2820720334>3.0.co;2-4.

Gliosarcoma with features of chondroblastic osteosarcoma

K Hayashi  1 , N Ohara, H J Jeon, S Akagi, K Takahashi, T Akagi, S Namba
Affiliations
Case Reports

Gliosarcoma with features of chondroblastic osteosarcoma

K Hayashi et al. Cancer. .

Abstract

Background: The occurrence of osteoid-chondral elements in gliosarcoma is extremely rare and has been reported in only two cases. A new, rare case of gliosarcoma with osteosarcomatous differentiation in a 55-year-old man and histogenesis of osteoid-chondral tissue in gliosarcoma is discussed.

Methods: Surgically removed tumor tissues were examined immunohistochemically and electron microscopically, and a histologic examination was performed.

Results: Immunohistochemical and electron microscopic studies confirmed the presence of glial, fibroblastic, and osteoid-chondral elements. A major part of the sarcomatous tissue was undifferentiated and stained only by vimentin. Some areas of osteoid-chondral tissue were positive for glial fibrillary acidic protein (GFAP).

Conclusions: These data suggest that osteoid-chondral elements came from the sarcomatous portion and GFAP positivity is not restricted to astrocytes and has been seen particularly in chondroid areas of non-glial tumors.

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