Description: Clinical showing the commedo openings, the greasy surface and a well defined edge.

History:

This seborrhoeic keratosis shows many of the classical features of this type of lesion. The borders are usually sharp with numerous commedo like openings, crypts and fissures. Pigmented areas are often stuctureless. In Harald Kittler's terminology there are many clods of varying colours with orange predominating. Milia like cysts are another common feature of seborrhoeic keratoses. Occassionaly a less pigmented area may show underlying hairpin like vessels.