Disseminated superficial actinic porokeratosis (DSAP) is a non-contagious skin condition with apparent genetic origin in the SART3 gene.

Some DSAP cases have been reported in patients with acute immune compromised situations, particularly in the elderly.

For those with sun damaged skin, the lesions usually begin to appear in the patient's 20s and increase in number and visibility in the 40s or 50s.

Commonly, though not always, the number and visibility of lesions is in direct proportion to the amount of sun damage to the affected area.

The thread-like ring is very thin, much like fabric thread for sewing, and raised such that it is both palpable and visible.