Table 1 Clinical expression of the variants of hereditary MTC associated syndromes
| Â | FMTC | MEN 2A | MEN 2B |
|---|---|---|---|
medullary thyroid cancer | 100% | 100% | 100% |
C-cell hyperplasia | 100% | 100% | 100% |
Pheochromocytoma | 0% | 10% to 60% | 50% |
Hyperparathyroidism | 0% | 10% to 25% | 0% |
Marfanoid habitus | 0% | 0% | 100% |
Intestinal ganglioneuromatosis | 0% | 0% | 60% to 90% |
Mucosal neuromas | 0% | 0% | 70% to 100% |
thick corneal nerves | 0% | Rare | 60% to 90% |