A novel NEMO gene mutation causing osteopetrosis, lymphoedema, hypohidrotic ectodermal dysplasia and immunodeficiency (OL-HED-ID)
Catherine M L Roberts1, Janet E Angus, Ian H Leach
1Department of Dermatology, Nottingham University Hospitals, Nottingham, UK. catherine.roberts@nuh.nhs.uk
Insights
A novel mutation in the NEMO gene caused a rare genetic disorder in a boy, presenting as hypohidrotic ectodermal dysplasia, immunodeficiency, osteopetrosis, and lymphoedema. This case highlights NEMO gene mutations in complex pediatric multisystem diseases.
Area of Science:
- Genetics
- Pediatrics
- Immunology
Background:
- Genetic conditions are a growing cause of multisystem diseases in children.
- Hypohidrotic ectodermal dysplasia (HED) is a congenital disorder affecting teeth, hair, and sweat glands, often X-linked recessive.
- Mutations in the NF-κβ essential modulator (NEMO) gene cause diverse disorders, including incontinentia pigmenti.
Observation:
- A 6-year-old boy presented with a rare combination of hypohidrotic ectodermal dysplasia, immunodeficiency, osteopetrosis, and lymphoedema.
- This patient harbors a novel mutation in the NEMO gene.
- He is the longest-surviving reported male with this specific constellation of symptoms.
Findings:
- The patient's condition is linked to a previously unidentified mutation in the NEMO gene.
- The clinical presentation includes features of incontinentia pigmenti, observed in the patient and his mother.
- This case expands the known phenotypic spectrum associated with NEMO gene mutations.
Implications:
- This report contributes to understanding the genetic basis of complex pediatric multisystem disorders.
- It underscores the critical role of the NEMO gene in development and immune function.
- Further research into NEMO-related disorders may improve diagnosis and therapeutic strategies for affected children.
Abstract:
Genetic conditions are increasingly recognised as a cause of multisystem diseases in children. We report a 6-year-old boy with hypohidrotic ectodermal dysplasia, immunodeficiency, osteopetrosis and lymphoedema, associated with a novel mutation in the NF-κβ essential modulator (NEMO) gene. He is the longest surviving of three reported boys with these clinical features. Hypohidrotic ectodermal dysplasia, a congenital disorder of teeth, hair and eccrine sweat glands is most commonly inherited as an X-linked recessive trait. Associated immunodeficiency (HED-ID) may give rise to serious infections in early life. Mutations in the NEMO gene give rise to a heterogeneous group of disorders, including the X-linked dominant disorder incontinentia pigmenti. This is characterised by typical skin changes leading to linear pigmentary change and variable associated features; in males, prenatal death usually occurs. Our patient, like one if the previous cases and all of their mothers, demonstrates features of incontinentia pigmenti.
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