Abstract

BARROS, Daniela et al. Ectopic Intrathyroidal Thymus Mimicking a Thyroid Nodule. Acta Radiol Port [online]. 2020, vol.32, n.1, pp.31-32.  Epub June 30, 2021. ISSN 2183-1351.  https://doi.org/10.25748/arp.19163.

Ectopic thymus is a well-known embryological abnormality in children, despite being considered rare. To avoid unnecessary examination or biopsy, radiologists must be aware of this condition, especially in pediatric population. This report describes a pediatric patient with history of recurrent episodes of tonsillitis since 2 years of age. In the context of infectious mononucleosis, a cervical ultrasound was performed, which revealed a relatively hypoechoic lesion in the right lobe of the thyroid gland, similar to normal thymus echogenicity. Thyroid function tests were normal. After 3 years of follow-up, the intrathyroidal nodule maintained the same characteristics, having decreased in size from 12 mm to 8 mm.

Keywords : Ectopic thymus; Thymus; Thyroid; Ultrasound..

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