54 歲病患,圖A 的CT 是二年前中風左側putamen 出血,一直在做復健,圖B 是最近所做的CT,發現中腦之雙側大腦腳不對稱,此乃因:
left cerebral peduncle atrophy due to Wallerian degeneration
left cerebral peduncle atrophy due to previous hematoma compression
right cerebral peduncle swelling
中腦之雙側大腦腳不對稱,乃常見的正常變異(normal variation)