these include drug-induced hypermelanosis , hypermelanosis secondary to use of physical agents , hypermelanotic morphea , generalized scleroderma with diffuse hypermelanosis , a hyperkeratotic tumor in xeroderma pigmentosum , aberrant mongolian spot , and methoxsalen-ultraviolet-a-induced hypermelanosis .
C0043346
xeroderma pigmentosum
C0025684
methoxsalen