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Endocrine Abstracts (2021) 73 EP215 | DOI: 10.1530/endoabs.73.EP215

ECE2021 Eposter Presentations Thyroid (43 abstracts)

A neck mass revealing thyroid hemiagenesis in an adolescent girl with euthyroidism.

Ibtissem Oueslati , Asma Kardi , Meriem Yazidi , Amani Terzi , Fatma Chaker & Melika Chaker

La Rabta Hospital, University of Tunis El Manar, Faculty of Medicine, Endocrinology, Tunis, Tunisia


Thyroid hemiagenesis is defined as the absence of one lobe of the thyroid gland. It represents a rare congenital abnormality with a prevalence of 0.05 to 0.2%. The left lobe is more commonly affected than the right lobe. Thyroid hemiagenesis is incidentally found during a routine thyroid screen. Herein, we report a thyroid hemiagenesis revealed by a compensatory hypertrophy of the contralateral thyroid lobe in an adolescent girl with euthyroidism.


A 16-year-old girl was referred to our department for an anterior right neck mass. Her past medical history was unremarkable. On physical examination, she had a large right thyroid lobe with a complete absence of the left lobe. On biological investigations, she had a TSH level of 1.07 mIU/l (nr: 0.35–4.95) and a FT4 level of 1.09 ng/dl (nr: 0.70–1.50). Cervical ultrasound showed a complete absence of the left lobe of the thyroid and a large heterogeneous right lobe with hypervascularity. Scintigraphy confirmed the hemiagenesis of the left lobe of the thyroid gland and showed a diffuse enlargement of the right lobe with a high and uniform accumulation of the tracer. No ectopic thyroid tissue was noted. Anti-thyroperoxydase antibodies and anti-TSH receptor antibodies were negative. The patient remained euthyroid over the course of follow-up.


Thyroid hemiagenesis is commonly asymptomatic and thyroid function is usually normal. However, patient may present a goiter resulting from the development of a compensatory hypertrophy of the contralateral lobe as in our case.

Volume 73

European Congress of Endocrinology 2021

22 May 2021 - 26 May 2021

European Society of Endocrinology 

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