zd39 copy.JPG (95688 bytes) 39.The normal squamous epithelium at the left merges into the squamous cell carcinoma at the right, which is infiltrating downward. The neoplastic squamous cells are still similar to the normal squamous cells, but are less orderly. This is a  well-differentiated squamous cell carcinoma.

39.图示左边正常的鳞状上皮与右边向下侵袭的鳞癌细胞相连，鳞癌细胞跟正常细胞相似，但较不规则。这是分化好的鳞癌。