Squamous cell papilloma on the lip of a 43 year old female patient caused by human papillomavirus (HPV) infection. This is a benign (non-cancerous) growth that arises from epithelial cells after HPV infection. When the papillomas are found on the skin they are more commonly referred to as warts or verrucas but they may also occur on many other parts of the body. Oral papillomas are usually painless and may be left untreated. If treatment is required surgical excision that removes the head and the base of the lesion can be performed.