石灰化硬膜外血腫—頭部外傷後16年を経過した1例

Calcified Epidural Hematorna:Report of a Case incidentally found 16 Years after Head Injury

Ⅰ．はじめに

　外傷性硬膜外血腫は通常その経過がきわめて速やかでかつ致命率が高いことは周知の事実である．しかし，少数ながら慢性の臨床経過を示す症例が知られている^{7，10，11）}．これらのうち，頭部単純写にて石灰沈着像が認められた例ははなはだ稀有のようである．

　最近われわれは，頭部外傷後16年を経て，頭部単純写にて石灰沈着像を認めえた硬膜外嚢水川腫（陳旧性血腫）の1例を経験したので報告する．

A calcified epidural hydroma, or old hematoma, was incidentally found in the left parietal region of a 55-year-old man presenting status epilepticus due to uremia after a lapse of 16 years following head injury. The hydroma (10×7×1.2cm) was extirpated operativelly. There was an extensive calcification in the wall, and the outer wall showed bone-like metaplasia and hemosiderin deposit. No skull fracture was discernible. The dura and the brain surface neighboring the hydroma were groslsly normal.

The patient eventually died of uremia.