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Thyroid hemiagenesis associated with the right aortic arch.

N Konno¹, A Kanaya

¹Department of Internal Medicine, Hokkaido Central Hospital for Social Health Insurance, Sapporo, Japan.

Journal of Endocrinological Investigation

|October 1, 1988

Summary

This report details a rare case of left thyroid hemiagenesis in a 38-year-old woman, concurrently diagnosed with a right aortic arch. This unique combination of congenital anomalies, including absent left thyroid arteries, is unprecedented in medical literature.

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Area of Science:

* Developmental Biology
* Vascular Anatomy
* Endocrinology

Background:

* Thyroid hemiagenesis, the congenital absence of one thyroid lobe, is a rare developmental anomaly.
* Congenital abnormalities of the aortic arch, such as a right aortic arch, are also uncommon.
* The co-occurrence of these two specific anomalies has not been previously documented.

Observation:

* A 38-year-old female patient presented with diagnosed left thyroid hemiagenesis.
* Diagnostic imaging, including isotopic and ultrasonic methods, confirmed the absence of the left thyroid lobe.
* Angiography revealed the absence of left thyroid arteries and a right aortic arch with an isolated left subclavian artery.

Findings:

* The study presents a unique case of coexisting left thyroid hemiagenesis and a right aortic arch.

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* Diagnostic confirmation involved isotopic, ultrasonic, and angiographic imaging.

* The left subclavian artery was found to be isolated from the aorta in the presence of the right aortic arch.

Implications:

* This case highlights a potentially novel association between thyroid and aortic arch development.
* Further research is needed to elucidate the embryological mechanisms underlying this combined anomaly.
* Understanding such rare associations can contribute to improved diagnostic approaches for congenital malformations.