The surface is smooth, the outline is clear, the top umbilical depression is small and deep, or the depression disappears and looks like a polyp. Immature raised lesions are mostly caused by tissue inflammatory edema
The surface is smooth and the outline is clear. The umbilicate depression at the top is small and deep, or the depression disappears and appears polypoid. Immature protuberant lesions are mostly caused by inflammatory edema<br>