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Living with Permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndrome

A rare inherited condition with diabetes in newborns and a missing or small pancreas and cerebellum.

Understanding Permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndrome

Permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndrome is a rare inherited condition with newborn diabetes and missing or underdeveloped pancreas and cerebellum.

Babies have diabetes that needs insulin from the newborn period. The pancreas, the cerebellum (the brain's balance center), or both did not form fully. Signs appear in newborns and infants.

Signs & symptoms

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

  • Diabetes needing insulin in newborns
  • Missing or small pancreas
  • Small cerebellum
  • Small optic nerves
  • Triangular face
  • Short chin and low-set ears

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 brain and nervous system specialists, genetic specialists and hormone specialists.

  3. Consider genetic testing

    Changes in PTF1A are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Hormone specialists (endocrinologists)
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
How should insulin and digestion be managed?
What does the small cerebellum mean for development and movement?
Would PTF1A testing help our family?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesPTF1A

Changes in the PTF1A gene cause this condition. It is autosomal recessive, which means a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalEndocrine

Also known as: pancreatic and cerebellar agenesis

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndromeGARD ID 16670 · 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 Permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndrome.

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