Parkinson disease 19A, juvenile-onset
A juvenile form of Parkinson disease, a complex neurodegenerative disorder characterized by bradykinesia, resting tremor, muscular rigidity and postural instability, as well as by a clinically significant response to treatment with levodopa. The pathology involves the loss of dopaminergic neurons in the substantia nigra and the presence of Lewy bodies (intraneuronal accumulations of aggregated proteins), in surviving neurons in various areas of the brain. PARK19A is characterized by onset of parkinsonian symptoms in the first or second decade of life. Some patients may have additional neurologic features, including mental retardation and seizures.
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