subpapillary

Histopathologic examination showed hyperkeratosis of epidermis, increased thickness of the granular layer and dilation of subpapillary vessels filled with red blood cells.

组织病理学检查示表皮角化过度,呈乳头瘤,颗粒层厚,真皮乳头见大量张的毛细血,腔内含红细胞,血淋巴细胞浸润。