<unk>  is extremely rare and may occur at any age, though it is most often recognized in children and young adults. It strikes males and females of all races and exhibits no inheritance pattern. The medical literature contains case reports from every continent. Because it is so rare, and commonly misdiagnosed, exactly how many people are affected by this disease is not known. The literature frequently cites that fewer than 200 cases have been reported, though a consensus is building that many more cases occur around the world than have been reported.
Gorham's disease
Darier's disease
Chandler's disease
Texier's disease
Camisa disease
Milroy's disease
Minor's disease
Tornwaldt's disease