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Introduction: Many patients seen in the emergency department (ED) have central venous access placed or previously established placement. Catheters inadvertently placed in the arterial circulation may lead to complications or adverse events. Case Report: We present a case of hemiplegia in a 63-year-old man following intravenous fluid administration through a malpositioned catheter that was initially unrecognized. The patient initially presented to the ED for stroke-like symptoms and was discharged following workup. On a subsequent visit for similar symptoms, intra-arterial placement of the catheter was diagnosed. Conclusion: It is important for emergency physicians to be aware of this potential complication of central venous cannulation and that arterial malposition of a previously placed central line may go unrecognized with the potential to cause cerebral ischemia when cerebral blood flow is reduced by the infusion of intravenous fluids or medications.

Introduction: Patients commonly present with neck masses to the Emergency Department. The acute presentation of such a mass can be alarming to patients and their families. In this report we discuss a rare etiology of an acutely presenting neck mass in an adult. Case Report: We present a 19-year-old patient with an acute neck mass. The mass developed abruptly soon after initiation of a new upper body strength-training regimen. The patient’s history was unremarkable for any trauma or constitutional symptoms. Physical examination revealed the mass, which was diagnosed as a lymphatic malformation by imaging. Surgical removal was successful with pathology confirming the diagnosis. Conclusion: Lymphatic malformations, although rare, may present in adulthood. The acute presentation of a new mass, coupled with a lack of concerning constitutional symptoms, should increase the diagnostic suspicion of a lymphatic malformation.