A total thyroidectomy may be done for a variety of malignant tumors.The most common form of malignant thyroid nodule is a poorly encapsulated type known as:
A) follicular carcinoma.
B) anaplastic carcinoma.
C) papillary carcinoma.
D) medullary carcinoma.

Question

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Papillary carcinoma,which is poorly encapsulated,is the most common form (>70%)of malignant thyroid nodule.The second-most common form (10%),a well-differentiated form that is associated with iodine deficiency,is called follicular carcinoma.An undifferentiated form,medullary carcinoma accounts for 5% of malignancies.Anaplastic carcinoma is a highly aggressive and rapidly fatal malignancy that is more common in females and older adults.

A Total Thyroidectomy May Be Done for a Variety of Malignant