A newly admitted patient presents with altered behavior and changes in mood. Upon closer inspection, the patient also has muscle rigidity which progressed to choreiform movements. What is the best diagnosis for this?

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Huntington's disease is characterized by cognitive decline, dementia, and personality changes. The disease affects muscle coordination resulting in chorea (abnormal involuntary writhing movements). Syndenham's chorea is characterized by an acute onset of chorea primarily affecting the face and limbs. Parkinson's disease is a degenerative disease that causes muscle rigidity, tremors, gait and posture abnormalities, and bradykinesia. Dyskinetic syndrome is a generalized term referring to abnormal involuntary movement caused by an underlying disease.

A Newly Admitted Patient Presents with Altered Behavior and Changes