BRAF and thyroid gland papillary carcinoma: ATA low risk (<5%) category is defined as: (i) intrathyroidal PTC without vascular invasion, with or without small volume lymph node metastases (clinical N0 or ≤5 pathologic N1, all <0.2 cm in largest dimension); (ii) intrathyroidal encapsulated follicular variant of papillary thyroid cancer or intrathyroidal well-differentiated follicular cancer with capsular or minor vascular invasion (<4 vessels involved); (iii) intrathyroidal papillary microcarcinomas that are either BRAF WT or BRAF mutated (if known).