Four cases of leucoderma acquisitum centrifugam, which were treated with psoralens, are being reported. Sudden development of peripheral leucoderma in an insignificant nevus on the face is cosmetic problem leading to tension and anxiety in -young people with pigmented skin. Though spontaneous resolution of halo nevus is known, this can not be certain. Peripheral halo of depigrnentation responded favorably to the treatment with psoralens in a definite period, and this can be an important reassuring factor.
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