Among the 92 patients with genetic study, M694V was the MEFV gene mutation more frequently found in patients with PFM (n = 85 [92.4%]; as homozygous compound in 61 [66.3%] [18,28,30,31,32,34,35,36,38,40,42,44,46,47,49,50,51,52,54,57], as heterozygous compound in 18 [19.6%] patients [32,37,38,45,48,49,50,52,54], and as a single heterozygous mutation in 6 [6.5%] [32,44,47]). The gene discussed is MEFV; the disease is parietal foramina 1.