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1.

Salla disease

The allelic disorders of free sialic acid metabolism – Salla disease, intermediate severe Salla disease, and infantile free sialic acid storage disease (ISSD) ? are neurodegenerative disorders resulting from increased lysosomal storage of free sialic acid. The mildest phenotype is Salla disease, which is characterized by normal appearance and neurologic findings at birth followed by slowly progressive neurologic deterioration resulting in mild to moderate psychomotor retardation, spasticity, athetosis, and epileptic seizures. The most severe phenotype is ISSD, characterized by severe developmental delay, coarse facial features, hepatosplenomegaly, and cardiomegaly; death usually occurs in early childhood. [from GTR]

MedGen UID:
203368
Concept ID:
C1096903
Disease or Syndrome
2.

Sialic acid storage disease, severe infantile type

The allelic disorders of free sialic acid metabolism – Salla disease, intermediate severe Salla disease, and infantile free sialic acid storage disease (ISSD) ? are neurodegenerative disorders resulting from increased lysosomal storage of free sialic acid. The mildest phenotype is Salla disease, which is characterized by normal appearance and neurologic findings at birth followed by slowly progressive neurologic deterioration resulting in mild to moderate psychomotor retardation, spasticity, athetosis, and epileptic seizures. The most severe phenotype is ISSD, characterized by severe developmental delay, coarse facial features, hepatosplenomegaly, and cardiomegaly; death usually occurs in early childhood. [from GTR]

MedGen UID:
203367
Concept ID:
C1096902
Disease or Syndrome

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