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Pathology Thyroid Tumor 50dceefa

Which of the following is seen on electron microscopy of medullary thyroid carcinoma specimens?

A

Presence of electron-dense granules in the nucleus

B

Presence of electron-dense granules in the mitochondria

C

Presence of electron-dense granules in the endoplasmic reticulum

D

Presence of electron-dense granules in the cytoplasm

High-Yield Explanation

Medullary carcinoma on electron microscopy reveals variable numbers of membrane-bound electron-dense granules within cytoplasm of neoplastic cells.

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