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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 36-year-old man with no significant past medical history presents with lower back pain, lower extremity weakness, and urinary incontinence. A non-contrast enhancing lesion was found on lumbar MRI (T1 sequence without contrast image shown below). What is the most likely diagnosis?
A 38-year-old man presents with frequent headaches over the past year and recent development of polydipsia and polyuria. He has also been complaining of a dry cough, shortness of breath, and erythematous nodules along his shins bilaterally. MRI of the brain shows a contrast-enhancing lesion of the hypothalamus. Which of the following is the most likely diagnosis?
Which of the following medications used in the management of multiple sclerosis is the most teratogenic?
Identify the lesion shown below.
A 41-year-old female smoker with HTN is admitted to the Neuro ICU after having acute onset worst headache of life, found to have hyperdensity tracking sulcal lines on CTH. Her physical exam is otherwise normal on admission. On the fourth day of admission, she develops acute onset right arm and leg weakness and aphasia. She was last seen well 30 minutes prior. Which of the following is true?
The PET scan shown is most consistent with which of the following diseases?
Which of the following findings would most likely be found on histopathological analysis of the lesion shown in the image below?
Patients with Alzheimer’s disease usually have a loss of cholinergic neurons from which of the following regions?
A 14-year-old male is evaluated in your clinic for seizures. Past medical history is significant for brief staring spells in elementary school. Now the patient is having generalized seizures especially when he is sleep-deprived. Additionally, the patient has recently been experiencing jerky movements of both arms in the morning, resulting in him dropping objects from his hands. An EEG shows generalized 4-6 Hz polyspike and wave discharges. What is the most likely diagnosis?
A 48-year-old woman presents with acute onset of seizures, myoclonus, ataxia, and rapidly progressive dementia. CSF analysis reveals an elevated protein and mild pleocytosis. Brain MRI with and without contrast is unremarkable. Further investigation reveals elevated thyroid-stimulating hormone levels and anti-thyroid peroxidase antibodies. Which of the following is the most appropriate therapy?
Which of the following is not one of the absolute exclusionary criteria for tissue plasminogen activator (tPA)?
A 38-year-old man presents to the emergency room with a 2-month history of headaches, increased thirst, and decreased libido. CT scan of the head shows a suprasellar, partially calcified mass. An MRI was ordered thereafter and is shown below. What is the most likely diagnosis?
A 24-year-old female in her third trimester of pregnancy, with no other past medical history, presents with complaints of 1-2 times monthly episodes of sudden onset severe room spinning, nausea, and vomiting for 3 months. They happen randomly and are not associated with head movement. During an episode, sounds and bright light seem to bother her more. She denies motor weakness or hearing change. Her spells resolve after about 1 hour. She endorses she has had bad headaches in the past, but not with these episodes. She endorses she gets car sick easily. On neurologic examination, she has no focal findings, and her vitals are within normal limits. She had an MRI brain with MRA and MR Venogram, all of which were unremarkable. Which is the most likely etiology?
A 56-year-old female with a past medical history of IgA deficiency presents to the emergency room with a 4-day history of progressive, ascending lower extremity weakness. Neurological examination reveals flaccid paralysis of the bilateral lower extremities and areflexia. Imaging of the lumbar spine shows contrast enhancement of the cauda equina and CSF studies show elevated proteins and a normal WBC count. What is the most appropriate next step in therapy?