A case of extralobar pulmonary sequestration resected by video-assisted thoracic surgery (VATS)

症例は48歳, 女性.自覚症状なく偶然, 後縦隔腫瘍を疑わせる異常陰影を発見された.画像診断上良性腫瘍と診断し, 胸腔鏡下摘出術を施行した.腫瘤は胸膜に被われ, 奇静脈付近とつながる細い茎を有し, 容易に摘出できた.病理診断にて未分化な気管支と分化した気管支の混在を認め, 肺葉外肺分画症と診断した.本例は組織学的に胎生5~6週目 (腺様期初期) 頃の肺組織像を認め, 肺葉外肺分画症の発生機序として, 胎生初期に正常肺より分離するとするtraction theoryと合致する所見であった.

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