The authors report 2 cases of atypical vitiligo in which they observed 1) "cockade-like" lesions resembling those of "trichrome" vitiligo (from the centre to the periphery, achromic area, hypochromic ring, normal or hyperchromic border), 2) numerous linear achromic lesions corresponding to former excoriations (Koebner's phenomenon, isomorphic phenomenon). Related affections are discussed with reference to these cases; the trichrome vitiligo described by Lerner and Fitzpatrick, and the primary leukomelanodermas described in black patients by Basset and by Sarrat and Nouhouayi.
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