Misnomers in dermatology: an update.

The name of a condition in dermatology, gives a clue regarding the clinical feature, etiology, or histopathology of the disease. A disease might have been termed wrongly due to its resemblance to another known condition. Misnomers often mislead a physician regarding the etiology or histopathology of the condition. Here is a list of misnomers, with explanation, and the appropriate name in parentheses.