Multiple System Atrophy, Parkinsonian Type
A 50-year-old man clinically diagnosed with multiple system atrophy, parkinsonian type. He is shown to have a tremorless parkinsonism with axial-greater-than-appendicular rigidity, distal-arm postural and stimulus-sensitive myoclonus, and slow, slightly wide-based gait with freezing and postural instability when turning.
Irene Litvan, MD
CONTINUUM: Lifelong Learning in Neurology. 19(5, Movement Disorders):1189-1212, October 2013