<unk>  is very rare, occurring in less than 1 in 1,000,000 people. Fewer than 40 cases have been reported around the world to date.
Metachondromatosis
Verruciform xanthoma
Pseudoxanthoma elasticum
Warty dyskeratoma
Boomerang dysplasia
Phakomatosis
Neuroma cutis
Diffuse infantile fibromatosis