Molluscum contagiosum - Anogenital in
Molluscum contagiosum is a viral skin infection caused by a DNA poxvirus. It manifests as smooth firm papules with a central umbilication. Genital lesions are most commonly spread by sexual contact, and tend to be located on the hair-bearing regions of the mons and inguinal creases.
Molluscum contagiosum may also be spread by direct contact (most often in children) and autoinoculation. Infections have also been associated with swimming pool facilities via fomites.
Many cases are asymptomatic, but there can be surrounding irritation in association with pruritus. Molluscum may occur in tattoos. Papules may persist for several months and up to 2 years before disappearing. In the immunocompetent host, the disease tends to be self-limited.
Consider underlying immunodeficiency, such as human immunodeficiency virus disease, in patients with widespread disease or large, atypical papules and/or plaques.
B08.1 – Molluscum contagiosum
40070004 – Molluscum contagiosum
- Hidradenoma can be umbilicated although much larger.
- Condyloma acuminatum can look similar if small and acrochordons may appear similar as well.
- Herpes simplex lesions can resemble molluscum with a central umbilication, but lesions are fluid-filled rather than solid as in molluscum contagiosum.
- Sebaceous hyperplasia primarily occurs on the face and has a whiter to slight yellow, lobular appearance.
- Milia tend to be whiter in color and more concentrated on the face.
- Lobular capillary hemangioma (pyogenic granuloma) is obviously vascular with frequent ulceration.
- Lichen planus lesions are purple, pruritic planar papules that can also spread in a linear pattern.
- Basal cell carcinoma tends to be solitary.
- Keratoacanthomas have a central keratin core and grow rapidly.
- Papular acantholytic dermatosis