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,呈乳头瘤样增,层增厚,真皮乳头见大量增张的毛细,腔内含红细,周围淋巴细浸润。