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Journal of the Korean Society of Neonatology 2009;16(2):244-247.
Published online November 1, 2009.
A Case of Thyroid Hemiagenesis.
Joon Sung Kim, Kyung Yeon Lee, Ja Hyeong Kim, Sang Kyu Park, Jin Young Jeong, Ki Won Oh
Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea. pentawish@hanmail.net
갑상선 반쪽 무형성증 1례
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Thyroid hemiagenesis is a rare congenital anomaly in which one thyroid lobe fails to develop. Thyroid hemiagenesis usually does not cause clinical symptoms by itself, therefore, this anomaly is detected incidentally during the evaluation of other thyroid disorders. We describe a rare case of thyroid hemiagenesis in a 1-month-old female infant who presented with prolonged jaundice and abnormal laboratory findings of congenital hypothyroidism. The patient showed the characteristic features of thyroid hemiagenesis of the left lobe in Tc-99m pertechnetate scintigraphy and ultrasonography of the thyroid gland. The patient has improved with supportive care, including thyroid hormone replacement. Further long-term follow-up is required for the investigation of recurrence of thyroid abnormalities.
Key Words: Thyroid hemiagenesis; Hypothyroidism; Infant


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