Abstract

Resident in Internal Medicine, Mayo School of Graduate Medical Education, Rochester, MN (H.M.K.); Advisor to resident and Consultant in Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic, Rochester, MN (A.E.K.). A 69-year-old woman presented to her primary care physicianwith a 4-day history of fatigue and dizziness. She was 45 minutes late for her appointment because she had trouble driving to the office. She reported no motor or sensory deficits but had difficulty with coordination. Review of systems was positive for dysuria and urinary frequency. She did not have fever, chills, weight or appetite changes, respiratory, cardiac, or gastrointestinal symptoms, or recent head trauma. The patient’s medical history was remarkable for hypertension, hyperlipidemia, type 2 diabetes mellitus, osteoporosis, and gastroesophageal reflux disease. Medications included metoprolol tartrate, lisinopril with hydrochlorothiazide, lovastatin, cholecalciferol, and as-needed calcium carbonate. She had smoked half a pack of cigarettes per day for 40 years but had quit smoking 6 years previously. She didnot use alcohol or illicit drugs. On examination, the patient was afebrile with a blood pressure of 104/67 mm Hg, heart rate of 76 beats/min, respiratory rate of 17 breaths/min, oxygen saturation of 94% while breathing room air, and body mass index (calculated as weight in kilograms divided by height inmeters squared) of 39 kg/m. Shewas alert and oriented to person, place, and time. Her speech was dysarthric, and she had difficulty following simple commands. Her coordination was impaired with symmetric dysmetria on finger-to-nose testing, heel-kneeshin testing, and rapid alternating movements. Cranial nerves II through XII were intact. Results of motor and sensory examinations were within normal limits. Reflexes were symmetric. Lymph node, thyroid, cardiac, respiratory, gastrointestinal, musculoskeletal, and skin examinations identified no abnormalities.

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