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What forms the extracellular matrix throughout the body?

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On ultrasound of the thyroid gland, a 47-year-old woman presents with a hypoechoic node 1.6 cm in diameter with blurred margins and intranodular hypervascularization. The doctor suspects thyroid carcinoma. What method should be used to verify the diagnosis?a.Fine-needle aspiration biopsyb.Positron emission tomography (PET)c.Determine TSH level in the bloodd.Thyroid scintigraphye.Case monitoring
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