Answer: ABD
DISCUSSION:
Follicular carcinoma is more common in older patients (peak incidence in the fifth decade). The tumor has a marked propensity for vascular invasion and spreads hematogenously to bone, lung, liver, and central nervous system sites. Local nodal metastases are less common than in papillary carcinoma. Extensive angioinvasion indicates a less favorable prognosis. Papillary carcinoma is the most common type of well-differentiated thyroid carcinomas. Follicular carcinomas are rarely multicentric.
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