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Rapp-Hodgkin hypohidrotic ectodermal dysplasia syndrome.

I R Walpole¹, J Goldblatt

¹Department of Pediatrics, University of Western Australia, Perth.

Clinical Genetics

|February 1, 1991

Summary

Rapp-Hodgkin syndrome, a rare genetic disorder, affects teeth, hair, nails, and palate across three generations. Autosomal dominant inheritance is suggested, with varied symptoms including heat intolerance and scalp scarring.

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Area of Science:

Genetics
Dermatology
Pediatrics

Background:

Hypohidrotic ectodermal dysplasia (HED) is a group of genetic disorders characterized by abnormal development of ectodermal structures.
Rapp-Hodgkin syndrome is a rare subtype of HED with distinct clinical features.

Observation:

A family spanning three generations presented with variable manifestations of Rapp-Hodgkin syndrome.
Affected individuals exhibited anomalies in teeth, hair, nails, palate, and facial features.
The proband displayed additional severe symptoms including high sweat sodium, hypogenitalism, hypothelia, and significant scalp atrophy and scarring.

Findings:

The inheritance pattern observed within the family was consistent with autosomal dominant transmission.
The study delineates the variable expressivity of Rapp-Hodgkin syndrome, highlighting a spectrum of clinical involvement.
Specific features like heat intolerance and unique dermatological findings were noted.

Implications:

This case series expands the understanding of the Rapp-Hodgkin syndrome phenotype and its genetic basis.
Further research into the molecular mechanisms underlying HED subtypes is warranted.
Accurate diagnosis and genetic counseling are crucial for families affected by this rare condition.

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