[Ann Emerg Med. 2013;61:118.]

A 3-month-old, healthy, term, male infant presented to the emergency department for evaluation of an abdominal mass detected on clinical examination. His parents noticed increased abdominal fullness and green stools but thought that the infant was otherwise in his usual state of health. Vital signs were normal. Physical examination revealed a left upper abdominal mass and right scrotal hydrocele….

A 13-year-old, developmentally appropriate, Tanner’s stage IV boy, with history of type 1 diabetes, presented to a tertiary care pediatric emergency department after development of dysuria, urgency, and frequency, with mild gross hematuria. He did not have any systemic symptoms such as fevers, chills, or rigors. He did not have flank pain.

A 7-month-old male infant presented with fever for 2 days and rash for 1 day. The patient had received a diagnosis of croup 1 week before admission. Physical examination revealed hypotension and purpuric lesions with surrounding erythema over the right thigh and buttock (Figure 1). Laboratory testing revealed anemia, neutropenia, and hyponatremia. The buttock lesion evolved into a gangrenous…

A 16-year-old previously healthy male adolescent was admitted to the ICU with sudden left hemiparesis. Head computed tomography result without contrast was normal, whereas magnetic resonance imaging showed an extensive right middle cerebral artery infarction. Magnetic resonance angiography found absence of flow within the right internal carotid artery from its origination to its distal portion,…