Bowenoid papulosis (BP) is a clinical variant of a low-grade squamous cell carcinoma in situ (SCCIS) caused by the human papillomavirus (HPV), usually subtype 16, although other subtypes may occur. Smoking, early sexual initiation, multiple sexual partners, uncircumcised male sexual partners, and immunosuppression are contributory factors.

BP typically occurs in young sexually active adults. There is an equal male-to-female ratio. Lesions are usually asymptomatic and occur primarily in the genital and perianal region.

BP has a variable course, with a frequent potential for spontaneous regression as well as persistence and recurrence. A postsurgical excision recurrence rate of up to 20.3% has also been documented.

The risk of progression to invasive SCC in immunocompetent patients is estimated at 2.6%. In immunocompromised patients, the risk of invasive malignancy may be higher; one-half of HIV-infected patients with anogenital warts have SCCIS on histology.