According to MEFV gene mutations, patients with FMF were subdivided into those with homozygous/compound heterozygous mutation in exon 10 (n = 24), those with heterozygous mutation in exon 10 (n = 20), and those with mutation in exon 2 or without mutation but clinically diagnosed with FMF (n = 5). Here, MEFV is linked to familial Mediterranean fever.