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A 64-year-old woman is brought to the office by her husband for changes in her speech pattern. While neurocognitive testing was largely unremarkable, her spontaneous speech appears effortful, halting, and laced with grammatical errors. MRI of the brain revealed left posterior frontal and insular atrophy. Which of the following is the most likely diagnosis?
A 21-year-old woman with a past medical history of depression presents with recurrent episodes of out-of-body sensations lasting 30 seconds. This may be followed by 1-2 minutes of staring and unresponsiveness that she does not remember. She often remains confused for 10 minutes after an event. They occur 1-3 times every 2 weeks. An MRI brain is done and shows no pathology. Which test is the most diagnostically valuable next step in her workup?
A 38-year-old man presents with a 1-year history of neck pain and left upper extremity weakness. The symptoms started insidiously, and have slowly worsened over time. A sagittal cervical spine MRI is shown below (Left: T2 without contrast. Right: T1 with contrast). Which of the following is the most likely cause of his symptoms?
A 45-year-old male with AIDs presents with headache and fever. His recent CD4 count was 80, and he does not take his HAART therapy or prophylaxis. You perform a brain MRI (shown below) and discover a contrast-enhancing lesion with much vasogenic edema. With concern for cancer, a biopsy is performed. It shows microglial nodules with encysted bradyzoites and tachyzoites. What is the treatment of choice?
Which of the following is seen on muscle biopsy in patients with steroid myopathy?
A 65-year-old man presents to the emergency room with progressive weakness over the course of several months. Examination shows pure motor weakness with no sensory involvement, decreased reflexes, and diffuse fasciculations. An EMG shows a conduction block of motor neurons outside of compression sites and normal sensory conduction velocities. Which of the following of most appropriate for treatment?
Which of the following has the longest half-life?
A 40-year-old woman with a history of neurofibromatosis type 2 is presenting to the clinic with chronic anosmia and progressive left eye vision loss. Visual acuity testing reveals 20/200 OS and 20/20 OD. There is a left eye afferent pupillary defect. Funduscopic examination shows pallor of the left optic disc and blurring of the disc margins of the right optic disc. An MRI brain is ordered to localize the lesion. Based on the clinical examination, where will the pathologic lesion most likely be found?
A 54-year-old male with hypertension, hyperlipidemia, and atrial fibrillation on warfarin is newly diagnosed with epilepsy. Of the following medications, which is the most appropriate anti-seizure medication to prescribe?