NRAS and thyroid gland papillary carcinoma: These data are in agreement with findings that BRAF is the most common gene mutation (detected in approximately 50% of sporadic papillary thyroid cancers) [24, 25] and NRAS mutations (found with a frequency of 6% by Fukushima et al) [22] are the most prevalently identified additional mutations [21, 22, 24–26].