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Living with Intellectual disability, X-linked syndromic, Turner type

An X-linked condition (HUWE1-related) that affects brain development, with delayed speech, delayed walking, and facial differences.

Understanding Intellectual disability, X-linked syndromic, Turner type

Intellectual disability, X-linked, syndromic, Turner type is a condition that affects brain development and can cause a wide range of symptoms.

It is caused by changes in the HUWE1 gene. In some families only males are affected, and in others females can be too. Symptoms can include delayed development, poor or absent speech, delayed walking, scoliosis, or mild skeletal differences. Males may also have undescended testicles.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Delayed speech and language
  • Delayed walking
  • Crossed eyes (strabismus)
  • Deep-set eyes
  • Broad nasal tip
  • Ears rotated toward the back

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Can genetic testing for the HUWE1 gene confirm the diagnosis?
What therapies can help with speech and walking?
What does X-linked inheritance mean for female relatives?

Quick facts

InheritanceX-Linked

Changes in the HUWE1 gene cause this condition. It follows an X-linked pattern of inheritance.

Also known as: brooks wisniewski brown syndrome; brooks-wisniewski-brown syndrome; intellectual developmental disorder, x-linked, syndromic, turner type; mrxst; syndromic x-linked intellectual disability turner type; x-linked intellectual disability, brooks type

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Intellectual disability, X-linked syndromic, Turner typeGARD ID 81 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Intellectual disability, X-linked syndromic, Turner type.

Explore the Intellectual disability, X-linked syndromic, Turner type blog

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  • Eligibility is confirmed by the study team

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