Rare types of warts include: (1) keratohcgenital wart, a thickened keratinized surface, much like common warts or seborrheic keratoses, mostly on dry surfaces; (2) smooth papillary genital wart, a dome-shaped wart, similar in color to the skin, often on relatively dry areas, such as the penis, and other skin surfaces; (3) flattened Genital warts (natgenitalwart) are difficult to identify directly with the naked eye and are a subclinical lesion that usually requires special means (e.g., treatment of the skin surface with a 3%-5% acetic acid solution) to detect.