An Indian Family with Tyrosine Hydroxylase Deficiency.

BACKGROUND: Tyrosine Hydroxylase deficiency is a rare neurotransmitter disorder. CASE CHARACTERISTICS: An Indian family with the disorder. OBSERVATIONS: Phenotypic variation, elevated serum prolactin, genetic confirmation, and partial treatment-responsiveness. MESSAGE: Tyrosine Hydroxylase deficiency is a treatable inborn error of metabolism and serum prolactin assists in diagnosis.