Objective: To investigate the findings of contrast enhanced ultrasound for papillary thyroid carcinoma and its pathological bases.
Methods: Seventy two (72) patients with thyroid nodules underwent routine conventional ultrasound and color Doppler examination, and 86 nodules with TI RADS 3 were examined by contrast-enhanced ultrasound (CEUS . Histopathological examination was kept as standard reference and the findings of CEUS were analyzed. Pathological studies of all nodules were made after post-operative CD34 immunohistochemistry staining examination.
Results: Of the total 86 nodules, Adler CDFl classification grades were: grade 0-26. grade I-34. grade II-23 and grade III-3 nodules respectively. Enhancement pattern on CEUS showed that there was low enhancement on 71 nodules, iso enhancement on 12 and high enhancement on 3 nodules. The differences of echo mean intensity. the peak intensity, area under the curve for enhancement intensity and CD34 count between the nodules and surrounding tissue were statistical significant (P < 0. 001).
Conclusion: Low enhancement pattern on CEUS is the most common finding for papillary thyroid carcinoma, which is related to the difference of microvessel density between the nodules and surrounding tissues in papillary thyroid carcinoma.
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