Recently for the surgical treatment of the laryngeal cancer, the pre-operative radiation therapy has come to the limelight for the prophylaxis of the metastasis.
8 cases of the laryngeal cancer treated with 3, 000γ. and 7, 000 γ as pre-operative radiation were examined histologically and a survey was made about the period untill the operation after the pre-operative radiation. As far as 7, 000 γ of preoperative radiation therapy is concerned, it is effective to the cancer itself, but it give rise notable interstitial fibrosis and edema; on the contrary 3, 000 γ of pre-operative radiation therapy is concerned, it shows efficient prevention of the cancer cell, and the interstitial fibrous and edema is not so significant.
Results were obtained that 2 weeks are the most suitable to make the operation after the preoperative radiation therapy.
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