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Allan-Herndon-Dudley syndrome.
1Department of Pediatrics, University College of Medical Science and Guru Teg Bahadur Hospital, Delhi, India. Sanjay6verma@yahoo.com
Indian Journal of Pediatrics
|July 1, 2008
Summary
Allan-Herndon-Dudley Syndrome (AHDS), a rare X-linked disorder, involves mutations in the monocarboxylate transporter-8 gene. This case highlights classical clinical features and confirms abnormal thyroid hormone levels in a patient.
Area of Science:
- Genetics
- Endocrinology
- Neurology
Background:
- Allan-Herndon-Dudley Syndrome (AHDS) is a rare X-linked genetic disorder.
- It results from mutations in the monocarboxylate transporter-8 (MCT8) gene.
- MCT8 is crucial for thyroid hormone transport.
Observation:
- The study reports on a child presenting with classical clinical features of AHDS.
- Clinical manifestations included global developmental delay, central hypotonia, and nystagmus.
- Impaired hearing, spasticity, and joint contractures were also noted.
Findings:
- The patient exhibited characteristic deranged thyroid hormone levels in blood tests.
- Specifically, elevated free triiodothyronine (fT3) and decreased free thyroxine (fT4) levels were confirmed.
- These hormonal imbalances correlate with the observed neurological and physical symptoms.
Implications:
- This case reinforces the diagnostic criteria for AHDS.
- Understanding MCT8 transporter dysfunction is key to managing AHDS.
- Early diagnosis and intervention can potentially mitigate severe neurological outcomes in affected individuals.
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