Dermatoscope image of disseminated superficial actinic porokeratosis (DSAP) lesions on a patient's skin. This inherited condition causes well defined dry patches of skin, most often on the arms and legs. Onset is usually around 35-40 years of age and can be triggered by a suppressed immune system, sun exposure, injury, infection or systemic disease. In most cases the lesions are asymptomatic, however, in around 7% of cases they become cancerous. DSAP typically does not require treatment, although to improve the appearance of the lesions, topical drugs, laser therapy and cryotherapy (freezing) can be employed. |