Describe clinical features of molluscum contagiosum infection in the HIV-infected host. Molluscum contagiosum, a poxvirus infection, is seen in approximately 8% to 18% of patients with symptomatic HIV disease and AIDS. Although molluscum lesions often appear as dome-shaped, flesh-colored umbilicated papules, they can have an unusual appearance, involve atypical sites, and be widespread. In HIV disease, molluscum lesions tend to occur on the face, trunk, intertriginous areas, and buttocks as well as in the genital area. Beard area lesions are commonly seen, and these are probably spread by shaving. Lesions can be large (>1 cm, giant molluscum) or hyperkeratotic; can simulate skin cancers, common and genital warts, and keratoacanthomas; and can become confluent. Lesions can also involve the follicular epithelium with sparing of the interfollicular epithelium. Molluscum lesions can be associated with a localized chronic dermatitis surrounding a centrally located lesion (molluscum dermatitis). With progressive immune dysfunction, lesions increase in number and become diffuse. Disseminated cryptococcosis, histoplasmosis, and Penicillium marneffei infection can mimic facial molluscum contagiosum. Mastrolorenzo A, Urbano FG, Salimbeni L, et al: Atypical molluscum contagiosum infection in an HIV-infected patient, Int J Dermatol 37:378–380, 1998. |
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