Background: Altered mental status is a common cause for presentation to the emergency department with a broad differential diagnosis.
Case report: We present a unique case of altered mental status in a previously healthy man that was found to be secondary to primary central nervous system acute lymphoblastic leukemia. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Lumbar puncture remains a critical tool for emergency physicians in the diagnosis of central nervous system pathologies.
Keywords: acute lymphoblastic leukemia; altered mental status; central nervous system malignancy; lumbar puncture.
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