皮膚の血管筋腫の1例

ANGIOLEIOMYOMA OF THE SKIN

I．はじめに

　本邦における皮膚の血管平滑筋腫の報告は少く，菅原ら^1）によれば，1959年までに氏等の症例を含め，未だ9例にしか至つていない。その後現在までの報告は，私達が文献を渉猟した限りでは，上田ら^2）の1例を加え，計10例を数えるにすぎない。

　最近私達は，45歳，男の左下腿伸側に出来た胡桃大の腫瘤を組織学的に検索し，血管平滑筋腫と診断し得た1例を経験したので報告する。

A 45-year-old man with angioleiomyoma on the left lower leg of 20 year's duration was reported. It was a hard, subcutaneous, walnut-sized tumor with normal skin color which did not attach to the covered skin and the underlying structure. No subjective sensation was noted.

It was encapsulated and composed of 2 parts, thumb-and pea-sized tumors. Its cut surface was compact and grayish-white in color

Histologic picture was composed of numerous vascular structures and bundles of spindle-shaped cells, some of which merged in intravascular muscle bundles. The spindle cell was smooth muscle fiber which was red by Azan stain and yellow by Van Gieson's stain. Elastic fibers were some around the blood vessels and argyrophil fibers showed circular or mozaic pattern. No nerve fidere were found in the tumor.

It might arise from smooth muscles of venous wall.