Overview
Sandhoff disease, infantile form, is a rare and serious genetic condition that belongs to a group of disorders called lysosomal storage diseases. It is also known as GM2 gangliosidosis type II or Sandhoff disease type 1. In this condition, the body cannot properly break down certain fatty substances called GM2 gangliosides in the brain and other organs. This happens because the body is missing a key enzyme called beta-hexosaminidase, which is needed to break down these fats. Without this enzyme, these substances build up in nerve cells, causing progressive damage to the brain and nervous system. Babies with the infantile form of Sandhoff disease usually appear healthy at birth but begin showing symptoms between 3 and 6 months of age. Early signs include a slowing or loss of developmental milestones, such as the ability to sit, crawl, or babble. Over time, children develop worsening muscle weakness, seizures, vision and hearing loss, and an exaggerated startle response to loud noises. A characteristic finding is a cherry-red spot on the back of the eye, which doctors can see during an eye exam. The disease also affects organs outside the brain, sometimes causing an enlarged liver and spleen. Currently, there is no cure for infantile Sandhoff disease. Treatment focuses on managing symptoms and keeping the child as comfortable as possible. Research into potential therapies, including gene therapy and substrate reduction therapy, is ongoing but has not yet led to approved treatments for this form of the disease.
Also known as:
Key symptoms:
Loss of previously learned skills like sitting or babblingExaggerated startle response to loud soundsCherry-red spot in the back of the eyeProgressive muscle weakness and floppinessSeizuresVision loss progressing to blindnessHearing lossDifficulty swallowing and feeding problemsEnlarged head (macrocephaly)Enlarged liver and spleenIntellectual disability and developmental regressionStiffness or rigidity of the limbsUncontrollable muscle jerks (myoclonus)Failure to thrive and poor weight gain
Clinical phenotype terms (23)— hover any for plain English
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Infantile
Begins in infancy, roughly 1 month to 2 years old
Treatments
No FDA-approved treatments are currently listed for Sandhoff disease, infantile form.
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Specialists
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Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Sandhoff disease, infantile form.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What is the expected progression of the disease, and what changes should we prepare for?,What medications and therapies can help keep our child comfortable?,When should we consider a feeding tube, and how will that decision be made?,Are there any clinical trials or experimental treatments that our child might be eligible for?,What is the risk for our future children, and what are our options for family planning?,Should other family members be tested to see if they are carriers?,How can we access palliative care and family support services in our area?
Common questions about Sandhoff disease, infantile form
What is Sandhoff disease, infantile form?
Sandhoff disease, infantile form, is a rare and serious genetic condition that belongs to a group of disorders called lysosomal storage diseases. It is also known as GM2 gangliosidosis type II or Sandhoff disease type 1. In this condition, the body cannot properly break down certain fatty substances called GM2 gangliosides in the brain and other organs. This happens because the body is missing a key enzyme called beta-hexosaminidase, which is needed to break down these fats. Without this enzyme, these substances build up in nerve cells, causing progressive damage to the brain and nervous syste
How is Sandhoff disease, infantile form inherited?
Sandhoff disease, infantile form follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Sandhoff disease, infantile form typically begin?
Typical onset of Sandhoff disease, infantile form is infantile. Age of onset can vary across affected individuals.