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A 9-year-old boy presents to the clinic with complaints of gait and speech trouble. His mother reports he started walking “like he was drunk” a few months ago. He had genetic testing that confirmed a trinucleotide GAA repeat expansion in one of his genes. Which of the following findings on physical exam is least likely to be present?
Aquaporin-4 (AQP4) channels are found on which cell type?
Which of the following brainstem auditory evoked potential (BAEP) results is most consistent with brain death?
A 40-year-old with AIDs (CD4 count 60) presents to the emergency room with a 2-month history of progressive headache, confusion, and left sided weakness. MRI brain with and without contrast was performed and it showed ring-enhancing lesions in the basal ganglia and the right frontal lobe. A brain biopsy was performed and shown below. Which is the most likely diagnosis?
Axial T2 (left) and T1 (right) brain MRI images of a 3-month-old with a history of seizures and developmental delay are displayed below. Which of the following is the most likely cause for the pathology shown?