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Pathology
A palpable mass is noted in the right lobe of the thyroid of a 45-year-old man who visits his physician for a periodic checkup. A biopsy is performed and results in a diagnosis of medullary carcinoma of the thyroid. Which of the following histologic features of thyroid disease would most likely be present in this biopsy specimen?
Tumor cells with "Orphan Annie" nuclei
Psammoma bodies
Tumor cells embedded in an amyloid-laden stroma
Infiltrates of lymphocytes with germinal center formation
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