title: Index of suspicion. Case 1: Palpitations and dizziness in a teenage boy. Case 2: Arthritis in a 4-year-old girl. Case 3: Seizures, hallucinations, hyponatremia, and red urine in a teenage boy in India.
authors.affiliation: Department of Pediatrics, St Joseph Children's Hospital, Paterson, NJ, USA.
authors.forename: Vaneet Kumar
authors.initials: VK
authors.lastname: Kalra
authors.forename: Fuad M
authors.initials: FM
authors.lastname: Kiblawi
authors.forename: Dorothy
authors.initials: D
authors.lastname: Myridakis
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Crews
authors.forename: Morven S
authors.initials: MS
authors.lastname: Edwards
authors.forename: Kamakshya P
authors.initials: KP
authors.lastname: Patra
mesh_terms: D000293:Adolescent; D016918:Arthritis, Reactive / Q000175:diagnosis* / Q000188:drug therapy; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004244:Dizziness / Q000175:diagnosis*; D005260:Female; D006212:Hallucinations / Q000175:diagnosis*; D006801:Humans; D007010:Hyponatremia / Q000175:diagnosis*; D007194:India; D008297:Male; D017118:Porphyria, Acute Intermittent / Q000175:diagnosis* / Q000188:drug therapy; D012640:Seizures / Q000175:diagnosis*; D017180:Tachycardia, Ventricular / Q000175:diagnosis* / Q000188:drug therapy