Total 50 clinical symptoms reported for Infantile GM1 gangliosidosis 
Abnormal facial shape An abnormal morphology (form) of the face or its components.
 
Synonyms:Abnormal facial shape; Abnormal morphology of the face; Distinctive facies; Dysmorphic facial features; Dysmorphic facies; Facial dysmorphism; Unusual facial appearance; Unusual facies
Very frequent
Abnormality of the nervous system An abnormality of the nervous system.
 
Synonyms:Abnormality of the nervous system; Neurologic abnormalities; Neurological abnormality
Very frequent
Abnormality of the skeletal system An abnormality of the skeletal system.
 
Synonyms:Abnormality of the skeletal system; Skeletal abnormalities; Skeletal anomalies
Very frequent
Blindness Blindness is the condition of lacking visual perception defined as visual perception below 3/60 and/or a visual field of no greater than 10 degrees in radius around central fixation.
 
Synonyms:Blindness; Total vision loss
Very frequent
Developmental regression Loss of developmental skills, as manifested by loss of developmental milestones.
 
Synonyms:Loss of developmental milestones; Mental deterioration in childhood; Neurodevelopmental regression; Psychomotor regression; Psychomotor regression beginning in infancy; Psychomotor regression in infants; Psychomotor regression, progressive
Very frequent
Hearing impairment A decreased magnitude of the sensory perception of sound.
 
Synonyms:Deafness; Hearing defect; Hearing impairment; Hypacusis
Very frequent
Hepatosplenomegaly Simultaneous enlargement of the liver and spleen.
 
Synonyms:Enlarged liver and spleen
Very frequent
Infantile muscular hypotonia Muscular hypotonia (abnormally low muscle tone) manifesting in infancy.
 
Synonyms:Decreased muscle tone in infant; Hypotonia early; Hypotonia in infancy; Hypotonia, early; Infantile hypotonia
Very frequent
Intellectual disability Subnormal intellectual functioning which originates during the developmental period. Intellectual disability, previously referred to as mental retardation, has been defined as an IQ score below 70.
 
Synonyms:Intellectual disability; Mental deficiency; Mental retardation; Mental retardation, nonspecific; Mental-retardation; Nonprogressive intellectual disability; Nonprogressive mental retardation
Very frequent
Psychomotor retardation
 
Synonyms:Motormental retardation; Psychomotor impairment; Psychomotor slowing
Very frequent