Condition |
MEN 1 |
MEN 2A |
MEN 2B |
Hyperparathyroidism (high levels of parathyroid hormone) |
95% or more |
10–20% |
— |
30–80% |
— |
— |
|
Pituitary gland tumors |
15–42% |
— |
— |
Thyroid gland tumors (specifically medullary carcinoma) |
— |
More than 95% |
More than 95% |
Pheochromocytoma (tumor of the adrenal glands) |
— |
40–50% |
50% |
Neuromas (growths around nerves) on mucous membranes |
— |
— |
Almost 100% |
Physical characteristics similar to those in people with Marfan syndrome |
— |
— |
Almost 100% |
MEN = multiple endocrine neoplasia. |