4H syndrome gene panel

4H Syndrome Gene Panel

Overview

The 4H Syndrome Gene Panel is a genetic test used to identify mutations associated with 4H syndrome, a rare inherited neurological disorder. The name 4H stands for Hypomyelination, Hypodontia, and Hypogonadotropic Hypogonadism. This condition primarily affects the brain's white matter, dental development, and hormonal function.

Genes Analyzed

The panel typically includes:

• POLR3A
• POLR3B
• POLR1C
• POLR3K (where clinically indicated)

These genes are responsible for the majority of genetically confirmed cases of 4H syndrome.

Who Should Consider This Test?

This test is recommended for individuals with:

• Developmental delay or regression
• Progressive movement disorders (ataxia, tremors, dystonia)
• MRI findings suggestive of hypomyelination
• Delayed or missing permanent teeth (hypodontia)
• Delayed puberty or hormone deficiencies
• Family history of leukodystrophy or inherited neurological disorders

Sample Required

• Peripheral Blood (EDTA)

Test Method

• Next-Generation Sequencing (NGS)
• Sanger Sequencing confirmation (if required)

Benefits

• Confirms the genetic cause of 4H syndrome
• Supports early diagnosis and clinical management
• Helps guide treatment planning and supportive care
• Enables genetic counseling for affected families
• Assists in assessing recurrence risk for future pregnancies

Why Choose This Test?

Early genetic diagnosis helps avoid unnecessary investigations, provides clarity regarding prognosis, and enables appropriate multidisciplinary care involving neurologists, endocrinologists, dentists, and rehabilitation specialists.

Note: A positive result should always be interpreted alongside clinical findings, MRI results, and family history by a qualified healthcare professional or genetic counselor.