Which physical findings are characteristic of disseminated superficial actinic porokeratosis (DSAP)?

Updated: Oct 09, 2020
  • Author: Amarateedha Prak LeCourt, MD; Chief Editor: William D James, MD  more...
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Answer

Dozens of small, indistinct, light brown patches with a threadlike border are seen on the extensor surfaces of the arms and the legs.

Facial lesions are seen in approximately 15% of patients. Nonactinic disseminated superficial porokeratosis (DSP) has a generalized distribution, sparing the palms and the soles. Bullous and pruritic variants have been described. Note the images below.

Disseminated superficial actinic porokeratosis on Disseminated superficial actinic porokeratosis on the lower legs of a female patient.
A 42-year-old woman with multiple lesions on the p A 42-year-old woman with multiple lesions on the pretibial aspects of the legs.

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