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Living with Pontocerebellar hypoplasia type 10

A rare genetic brain condition with severe developmental delay, a head that grows slowly, stiff muscles and seizures, starting from birth.

Understanding Pontocerebellar hypoplasia type 10

Pontocerebellar hypoplasia type 10 is a rare genetic brain condition that affects the cerebellum and pons, parts of the brain that help with movement and coordination.

It starts around birth. People have severe delay in learning to move and speak, a head that grows more slowly over time (progressive microcephaly), stiffness that worsens (spasticity) and seizures. Some have distinctive facial features and nerve damage affecting feeling and movement.

Signs & symptoms

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

  • Severe delays in movement and speech
  • Intellectual disability
  • Small head size (microcephaly)
  • Stiff muscles (spasticity)
  • Seizures
  • Low muscle tone and poor head control

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 seizure and epilepsy specialists.

  3. Consider genetic testing

    Changes in CLP1 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

    Epilepsy Foundation may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Seizure and epilepsy specialists (epileptologist)
Expert care
Expert lists: Epilepsy 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 Epilepsy Foundation
  • 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
Should we have genetic testing for CLP1, and should siblings be tested?
What seizure treatments and therapies are available?
How should nerve problems be monitored?

Quick facts

Symptoms usually startNewborn
InheritanceAutosomal Recessive
GenesCLP1

Changes in the CLP1 gene cause this condition. It is autosomal recessive, meaning a child inherits a changed copy of the gene from each parent.

GeneticNeurological

Also known as: clp1 (cleavage and polyadenylation factor i subunit 1) related pontocerebellar hypoplasia; clp1 non-syndromic pontocerebellar hypoplasia; clp1-related pontocerebellar hypoplasia; congenital pontocerebellar hypoplasia type 10; non-syndromic pontocerebellar hypoplasia caused by mutation in clp1; pch10

Patient organizations

Broader rare-disease groups

Source: NIH GARD · Pontocerebellar hypoplasia type 10GARD ID 17680 · 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

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