Table 2.
| EIF1AX mutation type | Pathologic correlates |
|---|---|
| Isolated nonsplice | FA, TFND |
| Isolated splice | FA, TFND, FC |
| EIF1AX and other mutation(s) | TFND, FA, FC, NIFTP, PTC, AC |
| EIF1AX and RAS mutations only | TFND, FA, NIFTP, PTC |
| EIF1AX, RAS, TERT, and TP53 mutations | AC |
Abbreviations: AC, anaplastic carcinoma; FA, follicular adenoma; FC, follicular carcinoma; NIFTP, noninvasive follicular thyroid neoplasm with papillary-like nuclear features; PTC, papillary thyroid carcinoma; TFND, thyroid follicular nodular disease.