A 72-year-old Caucasian female is brought to her primary physician’s office by her son after becoming lost in her own home. She enters the room with a marked shuffling gait. A review of systems is ...

A 72-year-old Caucasian female is brought to her primary physician’s office by her son after becoming lost in her own home. She enters the room with a marked shuffling gait. A review of systems is  positive for incontinence but is otherwise unremarkable; she denies the presence of tremor. A CT shows enlarged ventricles. What is the most likely etiology for her constellation of symptoms?

 A. MS

 B. Parkinsonism

 C. Alzheimer

 D. NPH