Osmar Cassio Saito MD, PhD, Presenter: Nothing to Disclose

Maria Cristina Chammas PhD, Abstract Co-Author: Nothing to Disclose

Felipe Boschini Franco MD, Abstract Co-Author: Nothing to Disclose

Sandra M. Tochetto MD, Abstract Co-Author: Nothing to Disclose

Giovanni Guido Cerri MD, PhD, Abstract Co-Author: Nothing to Disclose

(1) The purpose of this educational exhibit is describe the imaging patterns of elastography in solid or cystic/solid benign and malign thyroid nodules; (2) To establish a mean elastography index for benign and malign thyroid nodules; (3) To compare elastography results with fine needle aspiration (FNA) or surgery findings; (4) To be able to reproduce the active elastography step by step.

Thyroid nodules are frequent and its nature usually is not always an easy task for ultrasound or any other imaging method. The final nodule diagnosis is often confirmed by FNA. Elatography is a new ultrasound techonlogy that provides information about tissue elasticity. There are three types of elastography, which includes: static, transient elastography and ARFI (acoustic radiation force impulse). This new technology is based on deformation under local probe pressure. Hard nodules are supposed to be malign whereas benign are often soft. We made a retrospective study with 128 cases and our results are similar to the worldwide literature. However there is no consensus regarding the elastography index for each sort of nodule. The elastography index is calculated by means of comparing the deformation percentage of nodule tissue and normal surround parenchyma. In our study benign nodules have an index of 1,2 whereas an index of 4,5 or more is considered malign.

http://abstract.rsna.org/uploads/2014/14013419/14013419_46wl.pdf

Saito, O, Chammas, M, Franco, F, Tochetto, S, Cerri, G, Elastography of Thyroid Nodules: Which Elastography Index Can Predict Malignancy?.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14013419.html