Elastographic presentation of medullary thyroid carcinoma.

Area of Science:

• Medical Imaging
• Oncology
• Endocrinology

Background:

• Medullary thyroid carcinoma (MTC) is a rare neuroendocrine tumor of the thyroid.
• Accurate diagnosis of MTC is crucial for effective management.
• Elastography is an imaging technique that assesses tissue stiffness.

Purpose of the Study:

• To evaluate the elastographic appearance of histologically confirmed medullary thyroid carcinoma (MTC).
• To determine if qualitative elastography can aid in differentiating MTC from other thyroid nodules based on elasticity.

Main Methods:

• Retrospective analysis of 18 histologically proven MTC nodules.
• Free-hand qualitative elastography performed using Hitachi Logos EUB 7500.
• Nodules classified using an elasticity score (ES) based on color elastogram (blue=hard, red=soft, green=intermediate).

Main Results:

• Over half (55.6%) of MTCs exhibited low-to-intermediate elasticity (ES1-3).
• The hardest lesions (ES4) correlated with ultrasonographic features suspicious for malignancy.
• Most MTCs presented an elastographic pattern typically associated with benign nodules.

Conclusions:

• The majority of MTCs demonstrate elastographic features suggestive of benignity.
• Qualitative elastography, based on hardness, provides limited additional diagnostic value for MTC.
• This technique appears to have a marginal role in the evaluation of MTC.