The haplotype Cw*0501-B180101 was observed in Moroccans and, therefore, it may be less specific; HLA-B*570101 was also positively associated at the allele and haplotype level (specific NPC haplotype: A*010101-Cw*0602-B*570101, absent in Tunisians and Moroccans). Here, HLA-B is linked to nasopharyngeal carcinoma.