Review Article
Genetic and Clinical Features of Multiple Endocrine Neoplasia Types 1 and 2
Table 5
Classification of RET mutations according to ATA risk level.
| ATA risk level | RET codons |
| A (low) | 768, 790, 791, 804, 649, 891 | B (medium) | 609, 611, 618, 620, 630, 631 | C (high) | 634 | D (highest) | 918, 883 |
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