Living with X-linked intellectual disability, Stevenson type
A rare X-linked condition with learning difficulty, low muscle tone, absent reflexes, tapered fingers, and distinct facial features.
Understanding X-linked intellectual disability, Stevenson type
Other features include tapered fingers, extra fingerprint arches, knock knees, small teeth, and a distinct face. GARD says the gene appears to be in the q13 region of the X chromosome. It usually shows in childhood.
Signs & symptoms
Symptoms vary from person to person. GARD lists these among the most common:
- Intellectual disability
- Global developmental delay
- Low muscle tone (hypotonia)
- Absent tendon reflexes
- Tapered fingers and knock knees
- Feeding difficulties
Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.
Diagnosis
- 1Talk with your doctor
Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.
- 2See a specialist
Specialists who may be involved include brain and nervous system specialists and genetic specialists.
- 3Ask which tests can help
Your care team will decide which exams and tests can confirm the diagnosis.
Care & treatment
- Care team
- Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
- 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
Quick facts
GARD says the gene appears to be in the q13 region of the X chromosome, and the condition follows X-linked inheritance.
Also known as: x-linked intellectual disability stevenson type
Patient organizations
Rare-disease groups that can help
- Global GenesRare Diseases · United States
- National Organization for Rare DisordersRare Diseases · United States
- Genetic AllianceRare Diseases · United States
- RARE FoundationRare Diseases · United States
You are more than your diagnosis
Perspectives from people navigating life with X-linked intellectual disability, Stevenson type.
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