Hypervascularity

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Hypervascularity is an increased number or concentration of blood vessels.

In Graves disease, the thyroid gland is hypervascular, which can help in differentiating the condition from thyroiditis.{{cite book |title=Current Medical Diagnosis & Treatment 2019 |publisher=McGraw-Hill |pages=ch26}}

90% of thyroid papillary carcinoma cases are hypervascular.{{cite book |title=Diagnostic Ultrasound |date=2018 |publisher=Elsevier |pages=691–731 |edition=5}}