<unk>  is an uncommon benign lesion that has a<unk>  (wart-like) appearance, but it may appear polypoid, papillomatous, or sessile. The<unk>  was first described by Shafer in 1971 on the oral mucosa. Usually found on the oral mucosa of middle-aged persons,<unk> s have also been reported on the scrotum and penis of middle-aged to elderly Japanese males. While the most common site is the oral mucosa, lesions that occur elsewhere usually arise on the perineum or on the skin with some predisposing factor, such as lymphedema or an epidermal nevus.
Verruciform xanthoma
Pseudoxanthoma elasticum
Phakomatosis
Metachondromatosis
Keratoacanthoma
Linear and whorled nevoid hypermelanosis
Acanthoma fissuratum
Erythromelanosis follicularis faciei et colli