异型性
In addition, the lack of atypia rules out squamous cell carcinoma. 此外，无异型性可排除鳞状细胞癌。
The pathological picture showed the characteristics of an inverted papillma, however, focal areas of cytological atypia were also found. 在施行经尿道切除膀胱肿瘤后，排尿阻塞的症状消失，病理检查呈现内翻乳突瘤的特性，但是亦有局部区域有非典型的细胞变化。
