CTLA4 and vitiligo: In a previous study, Kemp et al., investigated the association of a microsatellite polymorphism lying in the 3 × UTR region of the CTLA-4 gene with vitiligo but their results indicated that in the absence of accompanying autoimmune diseases there was no association between the 106 bp allele and vitiligo.[10] Since in our study only 1.1% of the patients had a positive history of autoimmune diseases the comparison of the results with regard to this factor was not possible.