title: Unusual anterior neck mass visible only during Valsalva's maneuver in a child.
authors.affiliation: Department of Diagnostic Radiology & Organ Imaging, The Chinese University of Hong Kong, Prince of Wales Hospital, 30-32 Ngan Shing St., Shatin, Hong Kong, SAR. wongkatakjeffrey@hotmail.com
authors.forename: Ka Tak
authors.initials: KT
authors.lastname: Wong
authors.forename: Dennis L Y
authors.initials: DL
authors.lastname: Lee
authors.forename: Monica S M
authors.initials: MS
authors.lastname: Chan
authors.forename: Raymond K Y
authors.initials: RK
authors.lastname: Tsang
authors.forename: Edmund H Y
authors.initials: EH
authors.lastname: Yuen
authors.forename: Anil T
authors.initials: AT
authors.lastname: Ahuja
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D006547:Hernia / Q000000981:diagnostic imaging*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013950:Thymus Gland / Q000473:pathology*; D014463:Ultrasonography; D014636:Valsalva Maneuver