ICD-11 classes
05 Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C50 — Inborn errors of amino acid or other organic acid metabolism
5C50.D — Disorders of branched-chain amino acid metabolism
5C50.D0 — Maple-syrup-urine disease
ICD-11 5C50.D0 — Maple-syrup-urine disease
Maple syrup urine disease (MSUD) is a disorder of branched-chain amino acids metabolism. Four forms are described. The early onset classic form manifests after birth by lethargy, poor feeding and neurological signs of intoxication. Clinical course without treatment is characterised by deepening coma with maple syrup odour of urine. Subacute MSUD manifests later with encephalopathy, mental disability, major hypotonia, opisthotonus and cerebral atrophy with severe outcome. The intermittent form of MSUD may manifest at any age and presents with repeated ketoacidotic coma. Thiamine-responsive MSUD is a very rare form characterised by improvement of the biochemical profile with thiamine therapy.
The diagnosis includes nothing.
The diagnosis excludes nothing.
It has no clarifying diagnoses.
The diagnosis is coded elsewhere: