Question

which of the following is the most common primary malignant tumor of the thyroid gland?
○ follicular carcinoma
○ medullary carcinoma
○ follicular adenoma
○ papillary carcinoma

Explanation:

To determine the most common primary malignant tumor of the thyroid gland, we analyze the options:

• Follicular carcinoma: Less common than papillary carcinoma.
• Medullary carcinoma: Not the most common thyroid malignancy.
• Follicular adenoma: Benign, not malignant.
• Papillary carcinoma: Accounts for the majority of thyroid cancers, making it the most common primary malignant thyroid tumor.

Answer:

D. Papillary carcinoma