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A 59-year-old patient presented to his family physician 8 years ago with initial complaints of increasing generalized stiffness with trouble initiating movement and worsening micrographia. He was started on levodopa after further evaluation led to a suspected diagnosis of Parkinson's disease; however, this therapy ultimately failed to improve the patient's symptoms. Additionally, over the ensuing 8 years since his initial presentation, the patient also developed symptoms including worsening balance, orthostatic hypotension, urinary incontinence, and impotence. The patient's overall condition deteriorated ever since this initial diagnosis with increasing disability from his motor symptoms, and he recently passed away at the age of 67, 8 years after his first presentation to his physician. The family requests an autopsy. Which of the following would be expected on autopsy evaluation of this patient's brain tissue?
Astrocytosis and caudate atrophy
Glial cytoplasmic inclusions
Round intracellular tau protein aggregates
Periventricular white matter plaques
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