title: Radiology quiz case 2. Ectopic thymus.
authors.affiliation: Washington University School of Medicine, St Louis, Missouri, USA.
authors.forename: Tom
authors.initials: T
authors.lastname: Thomas
authors.forename: Dan
authors.initials: D
authors.lastname: Sdrulla
authors.forename: Anita
authors.initials: A
authors.lastname: Jeyakumar
mesh_terms: D002828:Choristoma / Q000175:diagnosis*; D006801:Humans; D007231:Infant, Newborn; D008279:Magnetic Resonance Imaging; D008297:Male; D009333:Neck; D013950:Thymus Gland