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现将第十二届国际癌症大会有关头颈肿瘤的学术动态整理介绍如下: 一、口腔癌斯里兰卡Cooke报告嚼烟和口腔卫生不良可引起癌前改变。一般癌前改变的潜伏时间很长,约20年才发生癌变。癌前改变包括角化过度增殖,粘膜下纤维化改变,异常有丝分裂和表皮下淋巴细胞浸润,粘膜的酶水平下降,以及全身性贫血。局部癌变时表现为出血性结节或硬结,此时应行活检。舌癌:巴拉圭M.Riverds报告舌癌外科手术79例,术后死亡4例。36例生存,其中1～3年22例,10年9例,17～28年5例。原
The 12th International Conference on Cancer is now collated on the academic dynamics of head and neck cancers as follows: 1. Oral cancer Sri Keoke reported that chewing tobacco and poor oral hygiene can cause precancerous changes. The latent period of precancerous changes is very long, and canceration takes about 20 years. Precancerous changes include hyperkeratosis, submucosal fibrosis, abnormal mitosis and subcutaneous lymphocyte infiltration, decreased mucosal enzyme levels, and systemic anemia. When local cancer is manifested as hemorrhagic nodule or induration, biopsy should be performed at this time. Tongue cancer: M. Rivers of Paraguay reported surgery for tongue cancer in 79 cases and 4 deaths after surgery. Thirty-six patients survived, including 22 cases 1 to 3 years, 9 cases 10 years, and 5 cases 17 to 28 years. original