Calcitonin levels increased in
a) Hyperthyroidism
b) Hyperparathyroidism
c) Hypoparathyroidism
d) Cushing Syndrome
Correct Answer - B
Ans: B. Hyperparathyroidism
The serum calcitonin level is strongly increased in this type of
cancer. After successful total thyroidectomy, calcitonin is no
longer detectable. Increasing concentrations of calcitonin after
therapy indicate relapse or metastasis. Hyperparathyroidism is
present in 20-30% of patients with medullar thyroid carcinoma.