In sinonasal MM, a high prevalence of NRAS mutations has been reported [36]; however, a lack of KIT alterations with a high prevalence of BRAF mutations has been reported in some populations, such as those from South Italy [13] or from Germany [37], but not in the majority of the others (as those from Japan, Poland, Spain, and the United States [38]), further suggesting that patients’ origin may account for different mutation rates in candidate cancer genes. This evidence concerns the gene NRAS and Miyoshi myopathy.