Thyroid adenoma ultrasound

Thyroid adenoma Microchapters
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2] Roukoz A. Karam, M.D.[3]

Overview

On ultrasound, thyroid adenoma is characterized by halo sign or smooth margin of thyroid, hyperechoic nodules, and normal reactive cervical nodes.

Ultrasound

Key Ultrasound Findings in Thyroid Adenoma

• The blood assays may be accompanied by ultrasound imaging of the nodule to determine the position, size, and texture, and to assess whether the nodule may be cystic (fluid filled).
• Ultrasound features showing a significant association with malignancy:
  • Solid component
  • Hypoechogenicity
  • Marked hypoechogenicity
  • Microlobulated or irregular margins
  • Microcalcifications
  • Taller-than-wide shape

• Risk of malignancy increases with the increase in number of suspicious ultrasound features.

Ultrasound characteristics of thyroid nodules ▸ Halo sign or a smooth magrin ▸ Normal reactive cervical nodes ▸ Cystic nodule ▸ Spongioform nodules ▸ Hyperechoic masses ▸ Eggshell calcifications ▸ A decrease in size over time Adapted from Arzu Tatlıpınar1 and İlkay Kartal [Updated 2015].The Evaluation of Thyroid Nodules. Journal of Thyroid Disorders & Therapy.2015. Colloid Nodule Isoechoic to hypoechoic May have internal cystic or heterogeneous change May have calcification Multiple echogenic foci (of inspissated colloid) with comet tail artifact Ultrasound Examples of Thyroid Adenoma Comet tail artifacts from colloid. Ultrasound image of colloid thyroid adenoma.http://www.wikipedia.org References