Natural History Study for Pediatric Patients With Early Onset of Either GM1 Gangliosidosis, GM2 Gangliosidoses, or Gaucher Disease Type 2

You may be eligible if

• Patient with either GM1 gangliosidosis, GM2 gangliosidoses (Tay-Sachs, Sandhoff, or AB Variant), or Gaucher Disease Type 2.
• Diagnosis confirmed by either biochemical (enzyme activity) or genetic testing, or both.
• Date of birth on or after 1 January 2000.
• Onset of first neurological symptom within 24 months of age.
• Informed consent of parent or legal guardian as required by local law.