Which of the following statements regarding medullary carcinoma of the thyroid are true?
A. Bilateral medullary carcinoma of the thyroid occurs in every patient with multiple endocrine neoplasia 1, 2a or 2b
B. Medullary carcinoma of the thyroid accounts for approximately one-third of all thyroid malignancies
C. 20% of medullary carcinoma of the thyroid cases are familial
D. Provocative testing with pentagastrin and calcium infusion for family members at risk for medullary carcinoma of the thyroid is diminished in importance by the recent development of specific genetic testing
Answer:A
Which of the following statements regarding medullary carcinoma of the thyroid are true?
A. Bilateral medullary carcinoma of the thyroid occurs in every patient with multiple endocrine neoplasia 1, 2a or 2b B. Medullary carcinoma of the thyroid accounts for approximately one-third of all thyroid malignancies C. 20% of medullary carcinoma of the thyroid cases are familial D. Provocative testing with pentagastrin and calcium infusion for family members at risk for medullary carcinoma of the thyroid is diminished in importance by the recent development of specific genetic testing