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Hereditary sensory autonomic neuropathy Type IV
Tarun Dua1, Jyoti Sharma, Tanu Singhal
1University College of Medical Sciences, New Delhi, India. tdua@sify.com
Indian Pediatrics
|April 9, 2005
Summary
Hereditary sensory autonomic neuropathy Type IV (HSAN IV) is a rare disorder causing lack of pain and temperature sensation, leading to self-injury. Affected children experience anhidrosis and recurrent fevers due to impaired sweat gland function.
Area of Science:
- Neurology
- Genetics
- Pediatrics
Background:
- Hereditary sensory autonomic neuropathy Type IV (HSAN IV) is an autosomal recessive disorder.
- It results from defective maturation of small myelinated and unmyelinated peripheral nerve fibers responsible for pain and temperature sensation.
Observation:
- The study describes the clinical presentation of two children diagnosed with HSAN IV.
- Key features include anhidrosis (inability to sweat) and recurrent episodes of hyperpyrexia (high fever).
Findings:
- Patients with HSAN IV exhibit a lack of pain and temperature sensation, predisposing them to self-mutilation.
- Impaired innervation of sweat glands leads to anhidrosis and dangerous hyperpyrexia.
Implications:
- Understanding HSAN IV is crucial for early diagnosis and management of affected children.
- This rare neuropathy highlights the importance of sensory nerve function in maintaining homeostasis and preventing injury.