Question

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

Explanation:

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

• Follicular adenoma is a benign tumor, so it is not malignant and can be eliminated.
• Papillary carcinoma is the most common type of primary malignant thyroid tumor, accounting for a large proportion of thyroid cancers.
• Follicular carcinoma is less common than papillary carcinoma.
• Medullary carcinoma is also less common compared to papillary carcinoma.

Answer:

B. Papillary carcinoma