Derm Dx: Asymptomatic reddish-purple papules

A man in his late 20s presented to the clinic complaining of several reddish-purple papules on his upper thighs and scrotum. He first noticed the bumps several months earlier and asserted that they had not changed in shape, size or color.

The bumps were not itchy, painful, or otherwise bothersome, but the patient was concerned about their appearance and location. ...