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。
This image shows squamous metaplasia of the lining of the renal pelis with broad tongues of squamous epithelium infiltrating underneath. 下图可见肾盂上皮呈显鳞状上皮化生，宽舌状的鳞状上皮向下浸润。
