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Overview

What Is Shwachman-Diamond Syndrome?

Shwachman-Diamond syndrome is a rare inherited disorder that usually begins in infancy or early childhood. It commonly affects the bone marrow, pancreas, growth and the skeleton. Children may have problems making blood cells, digesting food, gaining weight or developing bones normally. The condition is also called Shwachman-Bodian-Diamond syndrome, or SDS, and its severity varies from person to person.

Symptoms

Shwachman-Diamond Syndrome Symptoms

  • Poor growth or difficulty gaining weight
  • Chronic diarrhea
  • Greasy, oily stools (steatorrhea)
  • Frequent or recurrent infections
  • Easy bruising
  • Unusual bleeding
  • Fatigue
  • Bone abnormalities
  • Delayed development
  • Low blood cell counts (cytopenias)

Causes

Causes of Shwachman-Diamond Syndrome

Shwachman-Diamond syndrome is caused by disease-causing genetic changes, most often involving the SBDS gene. These changes interfere with normal cellular development and ribosome-related protein production, which cells need to make proteins and function properly. The resulting problems can affect the bone marrow, pancreas, skeleton and other tissues.

How is Shwachman-Diamond syndrome inherited?

Risk Factors

Risk Factors for Shwachman-Diamond Syndrome

  • Having disease-causing variants in both copies of the relevant gene increases the likelihood of developing Shwachman-Diamond syndrome.
  • Having a brother or sister with the condition increases the chance that another child in the family may be affected.
  • Being born to parents who both carry a disease-causing variant is an inherited risk factor.
  • A family history may be absent because carrier status is often unrecognized.

Shwachman-Diamond syndrome occurs in people of all sexes and ethnic groups. It is not caused by diet, exercise, parenting or other lifestyle choices. Because carriers may have no symptoms, the condition can occur even when no relative has previously been diagnosed.

Complications

Complications of Shwachman-Diamond Syndrome

  • Severe or recurrent infections
  • Anemia
  • Bleeding related to low platelets or other blood count problems
  • Malnutrition
  • Fat-soluble vitamin deficiencies
  • Diabetes or other pancreatic problems
  • Bone abnormalities
  • Liver problems
  • Delayed growth
  • Delayed puberty

LONG-TERM MONITORING

Blood count changes need follow-up

Persistent or worsening bone marrow abnormalities can increase the risk of myelodysplastic syndrome or acute myeloid leukemia. Regular blood count monitoring and follow-up with a specialist help identify important changes as early as possible.

Diagnosis

Diagnosis of Shwachman-Diamond Syndrome

Clinicians may suspect Shwachman-Diamond syndrome when a child has persistent low blood counts, recurrent infections, pancreatic insufficiency, poor growth, skeletal findings or a relevant family history. Because the signs can overlap with other conditions, diagnosis usually combines medical history, examination and several types of testing.

  • A complete blood count checks for anemia, low platelets, low neutrophils and other blood cell changes.
  • Pancreatic function and stool tests assess digestive enzyme production and fat malabsorption.
  • A nutritional assessment checks growth, weight and vitamin levels.
  • Skeletal imaging can identify bone abnormalities.
  • A bone marrow evaluation may be recommended when blood count problems require further investigation.
  • Molecular genetic testing looks for disease-causing variants, including changes in the SBDS gene.

Treatment & Management

Shwachman-Diamond Syndrome Treatment and Management

  • Pancreatic enzyme replacement helps the body digest food when the pancreas does not make enough enzymes.
  • Fat-soluble vitamin supplements and nutritional support help address malabsorption and poor growth.
  • Infections are treated promptly, and preventive measures may be recommended based on blood counts and individual risk.
  • Blood products may be used when anemia, low platelets or other blood problems are severe.
  • Growth and bone care may include regular assessments, nutrition support and treatment recommended by specialists.
  • Developmental, school-based or educational services can support learning and development.

When is stem cell transplantation considered?

CARE TEAM

Management is individualized

Hematopoietic stem cell transplantation may be considered for severe bone marrow failure, myelodysplastic syndrome or acute myeloid leukemia. Care is coordinated among hematology, gastroenterology, nutrition, endocrinology, genetics and other specialists according to the child’s needs.

Outlook and Prognosis

Shwachman-Diamond Syndrome Prognosis

The prognosis of Shwachman-Diamond syndrome varies widely. Some people have manageable lifelong health needs, while others develop severe bone marrow failure, serious infections or leukemia-related complications. Advances in monitoring and treatment can help clinicians respond to problems early.

Regular blood count monitoring, nutritional and pancreatic follow-up, growth and bone assessments, and prompt evaluation of new symptoms are important. Ongoing care allows the medical team to adjust treatment as a child’s needs change.

When Should You See a Doctor

When Should You See a Doctor?

  • Arrange an evaluation for persistent diarrhea or poor weight gain.
  • Arrange an evaluation for recurrent infections.
  • Ask for medical advice about unusual bruising or bleeding.
  • Discuss persistent fatigue with a clinician.
  • Seek assessment for bone abnormalities or concerns about growth.
  • Talk with a doctor or genetic counselor if a close relative has Shwachman-Diamond syndrome.

SEEK URGENT CARE

Some symptoms need prompt attention

Seek urgent medical care for fever in a child with known low neutrophil counts, trouble breathing, severe weakness, uncontrolled bleeding, signs of dehydration or a rapidly worsening infection.

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