The most frequent genotype was found in nine patients (21.4%) with partial BD and is characterized by the frameshift mutation c.98_104delGCGGCTGinsTCC (p.Cys33Phefs) and the c.1330G>C (p.Asp444His) variant on the BTD gene present in compound heterozygosity, both already reported in literature (7, 8). This evidence concerns the gene BTD and Behcet disease.