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lymphadenopathy. Diagnostic Workup Lumbar puncture showed elevated CSF pressure with 179 cells (lymphocytes), normal glucose (63 mg/dL), elevated protein (97 mg/dL), and absence of acid-fast bacilli on Ziehl-Neelsen staining. Gram stain, bacterial cultures, and PCR for mycobacterium were negative. Intradermal Mantoux skin test was reactive and showed

arc at the top border and includes a circular outline around a focal area in the lower half. A text

syndrome presented to the ER with a severe headache. He had been discharged from the pediatric unit for lower extremity pain a few weeks prior. He required prior exchange transfusions and intubation, with other complications including salmonella osteomyelitis, cholestasis, and nephropathy. He had been on hydroxyurea therapy since

arc** bypasses the brain for fast responses: Receptor → afferent neuron → interneuron in spinal cord → efferent neuron → effector **Patellar (knee-jerk