肺分画症は1946年Pryceにより命名された.肺組織の一部が正常肺から隔離され体循環系から分枝した異常動脈から血液供給をうける肺自体の発生異常である.今回，われわれは胸腔鏡手術で異常動脈の切離と肺葉切除術を行った肺葉内肺分画症の1例を経験したので報告する.%A 27-year-old woman was referred to our hospital for recurring fever. Computed tomography revealed a well-demarcated cystic mass in S10 of the right lung and an aberrant artery arising from the abdominal aorta and supplying the right basal segment. The bronchial tree was normal. We diagnosed the patient with intralobar pulmonary sequestration of the right lung. We performed closure of the aberrant artery and right lower lobectomy by means of thoracoscopic surgery. The aberrant artery with a diameter of 8 mm was cut using a 2.5 mm stapler alone. The post-operative course was uneventful. In this case, thoracoscopic surgery provided a satisfactory view which facilitated safe and correct surgical treatment of the aberrant artery.
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