Derm Dx: Purplish bumps on the forearm

A patient, aged 24 years, presented with complaints of purplish bumps on his forearm.

On physical exam, similar lesions on the forehead as well as on the hard palate were noted. The patient stated that he is otherwise healthy.

He admitted that he had unprotected sex with other men. He denies other medical problems. A HIV test was ordered but the ...