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はじめに
軟口蓋は口腔にまたがる筋組織からなる運動器官である。その機能欠損は予想以上に大きく,嚥下機能,構音機能,呼吸機能,中耳機能の障害を引き起こす。成人では舌咽神経麻痺以外に,癌腫症例で口蓋切除後の機能損失,特に嚥下機能障害が問題となる。この場合,軟口蓋の再建後に適度の軟口蓋咽頭間隙(velopharyngeal space)の確保が困難であったり,誤嚥のために喉頭機能の保存が難しい症例があり,軟口蓋の欠損に対する再建術は頭頸部再建外科の未解決の領域の1つとされている1)。
今回,われわれは軟口蓋深く浸潤した中咽頭癌症例(T3N2bMO)の手術時の軟口蓋全層2/3と中咽頭側壁の欠損に対し,分層遊離皮弁で裏打ちした大胸筋皮弁で再建術を施行した。術後,嚥下,構音機能ともほぼ満足のいく結果を得たのでその手術法について紹介する。
A surgical technique of palatal reconstruction with a pectoralis major myocutaneous flap in which the back surface was grafted with a skin flap, was reported. A 60-year-old male patient with meso-pharyngeal carcinoma (T3N2bM0) invaded the left palate to the lateral mesopharyngeal wall was treat-ed. After chemotherapy (CDDP+5 FU) with radio-therapy (32 Gy), Commando operation was carried out. After left radical neck dissection, a subtotal resection of the palate including the pharyngeal lateral wall was done by mandibular swing approach. Defect of the palate to the mesopharyn-geal wall was reconstructed with a skin-grafted pectoralis major myocutaneous flap. The patient had the satisfactory swallowing function as well as speaking at 4 weeks after the reconstruction sur-gery.
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