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Living with Alpha thalassemia-intellectual disability syndrome type 1

A rare condition from a missing piece of DNA, with a mild form of alpha thalassemia and developmental differences.

Understanding Alpha thalassemia-intellectual disability syndrome type 1

Alpha thalassemia-intellectual disability syndrome type 1 is a rare form of alpha thalassemia that comes with developmental differences.

It is a contiguous gene deletion syndrome, which means a piece of DNA containing several genes is missing. Blood tests show small, pale red blood cells, with a normal hemoglobin level or mild anemia. It starts in newborns and infants.

Signs & symptoms

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

  • Speech differences
  • Small head size (microcephaly)
  • Broad forehead
  • Easy bruising
  • Club feet
  • Small or missing earlobes

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

    Specialists who may be involved include blood and bone marrow specialists, brain and nervous system specialists and genetic specialists.

  3. Ask which tests can help

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

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); 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 Chromosome Disorder Outreach
  • 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
Which genes are missing in my child's case?
How should my child's blood counts be monitored?
Which therapies can support speech and development?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Dominant

GARD describes a contiguous gene deletion, meaning a missing piece of DNA that holds several genes. It lists autosomal dominant inheritance.

GeneticNeurologicalBlood

Also known as: alpha thalassemia intellectual disability syndrome, deletion type; alpha thalassemia-intellectual disability syndrome; alpha thalassemia-intellectual disability syndrome, deletion type; alpha thalassemia-retardation syndrome; alpha-thalassemia intellectual disability syndrome linked to chromosome 16; alpha-thalassemia-intellectual disability syndrome linked to chromosome 16

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Alpha thalassemia-intellectual disability syndrome type 1GARD ID 16862 · 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 Alpha thalassemia-intellectual disability syndrome type 1.

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