嚢胞性髄膜腫の2例

Cystic Meningioma:Report of Two Cases

Ⅰ．はじめに

　髄膜腫は神経膠腫についで多い頭蓋内腫瘍であるが，嚢胞を形成した髄膜腫に遭遇することはきわめてまれで，髄膜腫の1.2^18）−2.2％^4）にすぎない．

　嚢胞性髄膜腫についてわれわれが知りえた限りでは，44例が報告されており，このうち，本邦では川淵^9）の1例をはじめとして15例が報告されているにすぎない．

Cystic changes are rare in meningioma. The authors reported two cases of the cystic meningioma.

1) The first case was 56-year-old female, whose complaints were motor weakness and hypesthesia on the right side. At the operation, a hen egg-sized tumor with a large cyst was removed totally from the left frontoparietal mid-convexity. Multiple cystic cavities were contamed in the tumor. Histologically the tumor was compatible with meningocytic meningioma with angiomatous component and showed numerous myxomatous degeneration and swollen vessel-walls.