Young adult presents with a profusion of asymptomatic, small, umbilicated penile papules. He has had unprotected intercourse with many anonymous partners.
Key point: The globoid-shaped papules with central umbilication are typical for molluscum contagiosum, a pox virus infection spread by skin-to-skin contact.
Treatment: Sharp curettage removes lesions nicely. Light liquid nitrogen cryospray may also be efficacious in some patients. When surgical intervention is impractical, topical application of various irritants (such a tretinoin or salicylic acid) or immune modifiers (such as imiquimod) may be effective.
Note: The same disorder may occur in children, usually on the trunk or face. In this instance, the disease is not sexually transmitted. Treatment options are the same.