maple syrup urine disease type IB

A maple syrup urine disease that is characterized by mental and physical retardation, feeding problems, and a maple syrup odor to the urine and that has_material_basis_in homozygous or compound heterozygous mutation in the BCKDHB gene, which encodes a subunit

A maple syrup urine disease that is characterized by mental and physical retardation, feeding problems, and a maple syrup odor to the urine and that has_material_basis_in homozygous or compound heterozygous mutation in the BCKDHB gene, which encodes a subunit of the branched-chain alpha-keto acid dehydrogenase complex (BCKDC), on chromosome 6q14.

Signs and symptoms

• Lethargy
• Opisthotonus
• Hyperisoleucinemia
• Feeding difficulties
• Seizure
• Hyperleucinemia
• Hypervalinemia