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Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration

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Ectopic thyroid of the lung. An additional case.

N Di Mari¹, L Barbagli, V Mourmouras

¹Section of Anatomical Pathology, Department of Human Pathology and Oncology, University of Siena, Italy.

|December 22, 2010

Summary

Thyroid ectopy is rare, typically found in the neck. This case study details an unusual autopsy finding of ectopic thyroid tissue discovered incidentally within the lung of an elderly male.

Area of Science:

Pathology
Endocrinology
Anatomical Abnormalities

Background:

Thyroid ectopy is a congenital condition where thyroid tissue is found outside its normal location.
Most commonly, ectopic thyroid tissue presents along the thyroglossal duct pathway in the cervical midline.
Other reported locations are rare, making each case significant for understanding developmental pathways.

Observation:

An incidental finding of ectopic thyroid tissue was made during the autopsy of a 77-year-old male.
The aberrant thyroid tissue was located within the lung parenchyma.
No clinical history suggestive of thyroid dysfunction or prior diagnosis was available for this individual.

Findings:

Histological examination confirmed the presence of normal thyroid follicular tissue within the lung.

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This represents an extremely rare and unusual anatomical location for ectopic thyroid tissue.

The finding was incidental and not associated with any apparent pathology in the lung.

Implications:

This case expands the known spectrum of locations for ectopic thyroid tissue.
It highlights the importance of thorough examination during autopsy, even in the absence of suspected pathology.
Further research into the embryological mechanisms behind such rare ectopic presentations may be warranted.