臨牀消化器内科 Vol.18 No.11(6)


特集名 食道癌治療 -- 最近の話題
題名 T4食道癌治療における外科的切除の意義
発刊年月 2003年 10月
著者 藤田 博正 久留米大学医学部外科
著者 末吉 晋 久留米大学医学部外科
著者 田中 寿明 久留米大学医学部外科
著者 笹原 弘子 久留米大学医学部外科
著者 的野 吾 久留米大学医学部外科
著者 白水 和雄 久留米大学医学部外科
【 要旨 】 他臓器に浸潤するT4食道癌では,まず放射線化学療法が行われる.しかし,その後に食道切除を追加すべきかどうか,未だ結論が得られていない.われわれはinformed consentに基づいて患者が治療法を選択するというprospective trialによって,T4食道癌に対する放射線化学療法+手術vs放射線化学療法単独の臨床比較研究を行った.
その結果,T4食道癌の予後を規定する因子は放射線化学療法の効果であり,手術の有無ではないことが判明した.さらに,放射線化学療法が有効な症例では食道手術 (切除) の必要がなく,むしろ無効例において必要な可能性があるとの結論を得た.
Theme Current Topics on The Treatment for Esophageal Cancer
Title Esophagectomy, Is It Necessary after Chemoradiotherapy for a T4 Esophageal Cancer?: A Prospective Trial Comparing Chemoradiotherapy plus Surgery versus Chemoradiotherapy Alone
Author Hiromasa Fujita Department of Surgery, Kurume University School of Medicine
Author Susumu Sueyoshi Department of Surgery, Kurume University School of Medicine
Author Toshiaki Tanaka Department of Surgery, Kurume University School of Medicine
Author Hiroko Sasahara Department of Surgery, Kurume University School of Medicine
Author Satoru Matono Department of Surgery, Kurume University School of Medicine
Author Kazuo Shirouzu Department of Surgery, Kurume University School of Medicine
[ Summary ] To evaluate the results of chemoradiotherapy with versus without surgery in a locally-advanced (T4) esophageal cancer, a prospective comparative trial was performed, based on informed consent. After the first course of chemoradiotherapy-radiotherapy with a total dosage of 36 Gy and chemotherapy using cisplatin (CDDP) and 5-fluorouracil (5FU), patients chose to receive surgery or the second course of chemoradiotherapy-radiotherapy with total dosages of 24 Gy and chemotherapy using CDDP and 5FU. Fiftythree patients with a T4 esophageal cancer involving the tracheobronchus or the aorta were enrolled in this trial. In responders to the first course of chemoradiotherapy, there was no significant difference between the long term survival rates for the eighteen patients who underwent esophageal surgery (esophagectomy in seventeen and bypass in another) and the thirteen patients who did not (27% vs 33% in the five-year survival rates). In non-responders, the outcome of the eleven patients who underwent surgery (eight esophagectomies and three bypasses) was significantly better than the eleven patients who did not (57% vs 12% with a two-year survival rate). In multimodal treatment for T4 esophageal cancer, esophagectomy is not necessary for responders to chemoradiotherapy, while it may be necessary for non-responders.
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