PCWH syndrome

A syndrome that is characterized by the association of the features of Waardenburg-Shah syndrome (sensorineural hearing loss, pigmentary abnormalities and Hirschsprung disease; see this term) with neurological features, including: neonatal hypotonia, intellectual deficit (of variable severity), nystagmus, progressive spasticity, ataxia and epilepsy, and has_material_basis_in heterozygous mutation in the SRY-box 10 (SOX10) gene on chromosome 22q13.

methylmalonic aciduria and homocystinuria type cblD

A methylmalonic aciduria that is characterized by combined homocystinuria and methylmalonic aciduria and deficiency of MCM and MS activities.

short QT syndrome

A heart conduction disease that is characterized by heart arrhythmia defined as a short QT interval on an EKG (less than 300 ms) that does not significantly change with heart rate, tall and peaked T waves, and a structurally normal heart.

relapsing-remitting multiple sclerosis

A multiple sclerosis that is characterized by relapse (attacks of symptom flare-ups) followed by remission (periods of recovery). Symptoms may vary from mild to severe, and relapses and remissions may last for days or months. More than 80 percent of people who have MS begin with relapsing-remitting cycles.