原位癌(carcinoma in site)：多见于老年人， 好发于角膜结膜交界处，灰白色半透 明。病程长。
双语例句
1
Analysis on death of malignant carcinoma for the residents in disease surveillance site from 1992 to 1994 was reported.
对监测点1992 ~ 1994年居民恶性肿瘤死亡情况进行了分析。
2
Objective To study the value of clinical pathology in the diagnosis of cervical metastatic carcinoma of unknown primary site.
目的探讨临床表现及病理检查结果对原发部位不明的颈部转移癌原发灶的诊断价值。
3
Objective to explore the correlation between chromosome fragile sitein peripheral blood lymphocytes and proto-oncogene expression rate in patients with hepatocellular carcinoma.