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Living with Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndrome

A rare genetic condition with bone marrow that gradually stops making blood cells, weaker immunity, and skeletal differences.

Understanding Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndrome

Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndrome is a rare genetic condition that affects blood cells, immunity, and bones.

Bone marrow failure begins early and progresses, causing anemia, low white cells, and mildly low platelets. A shortage of B cells, a type of immune cell, can raise the chance of infections. Other features include developmental delay, cataracts, unusual facial features, short stature, and skeletal differences. It starts in newborns.

Signs & symptoms

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

  • Bone marrow failure
  • Anemia (low red blood cells)
  • Low white blood cells and B cells
  • Low platelets
  • Frequent infections
  • Short stature

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 allergy and immune system specialists, blood and bone marrow specialists, bone and joint specialists and brain and nervous system specialists.

  3. Consider genetic testing

    Changes in MYSM1 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Immune Deficiency Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Allergy and immune system specialists (allergists / immunologists); Blood and bone marrow specialists (hematologists); Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists)
Expert care
Expert lists: Immune Deficiency Foundation
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 Blood Cancer United and other patient organizations
  • 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
Would MYSM1 gene testing help our family?
How often should blood counts and immune function be checked?
Which specialists, such as blood and immune doctors, should be involved?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive
GenesMYSM1

It is caused by changes in the MYSM1 gene. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalBlood

Also known as: congenital progressive bone marrow failure, b-cell immunodeficiency, skeletal dysplasia syndrome; mysm1 (myb like, swirm and mpn domains 1) deficiency; mysm1 deficiency

Patient organizations

Source: NIH GARD · Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndromeGARD ID 22071 · 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 Congenital progressive bone marrow failure-B-cell immunodeficiency-skeletal dysplasia syndrome.

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