Squamous cell carcinoma of the skin is a malignant tumor of squamous epithelium.

Warts, benign growths on the skin or mucous membranes that cause cosmetic problems as well as pain and discomfort. Warts most often occur on the hands, feet, and genital areas.

A reduced number of lymphocytes in the blood.

A type of fungal meningitis caused by an encapsulated yeast that belongs to the genus Cryptococcus. Cryptococcus neoformans and Cryptococcus gattii are responsible for the majority of cases of human cryptococcosis.

An abnormally low count of T cells.

Human papillomaviruses (HPVs) are small oncogenic viruses. HPV has been shown to cause a variety of lesions and malignancies, which predominantly affect the anogenital region. Low-risk, non-oncogenic HPV types are associated with anogenital warts and recurrent respiratory papillomatosis while high-risk, oncogenic types are associated with cervical, penile, anal, vaginal, vulvar, and oropharyngeal cancers. Infection with anogenital HPV is usually asymptomatic and resolves spontaneously without consequences in the immunocompetent host. When disease does occur, the most common manifestation is genital warts, which may be small papules, or flat, smooth or pedunculated lesions. This resolution of HPV lesions is not generally seen in the immunosuppressed, resulting in severe, persistent and extensive manifestations of HPV disease.