isomorphic effect

isomorphic effect

Köbner's phenomenon Dermatology The induction of skin changes at site 'B,' which follows minimal nonspecific trauma–heat or light when identical lesions are already present elsewhere–site A; IE is typical of psoriasis and seen in lichen planus, eczema, verruca. Cf Id reaction.

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.