title: Congenital piriform fossa sinus tract presenting as an asymptomatic neck mass in an infant.
abstract: BACKGROUND
  A 5-month-old girl with an asymptomatic left-sided neck mass was demonstrated by ultrasound and upper gastrointestinal series (UGI), and confirmed at surgery, to have a congenital piriform fossa sinus tract (CPFST) that communicated with an intrathyroidal cyst.
  
  
  OBJECTIVE
  To demonstrate a case of CPFST presenting as an asymptomatic neck mass. Nearly all cases of CPFST present with infection or pain, making this case unique.
  
  
  METHODS
  Case report and review of the literature.
  
  
  CONCLUSIONS
  CPFST with an associated cyst should be added to the differential diagnosis of asymptomatic cystic neck masses in infants, especially if the cyst is intrathyroidal by ultrasound.
authors.affiliation: Department of Pediatric Imaging, Children's Hospital of Michigan, Wayne State University School of Medicine, 3901 Beaubien Boulevard, Detroit, MI 48201, USA. dbloom@dmc.org
authors.forename: David A
authors.initials: DA
authors.lastname: Bloom
authors.forename: Brent H
authors.initials: BH
authors.lastname: Adler
authors.forename: Robert C
authors.initials: RC
authors.lastname: Forsythe
authors.forename: Khaled
authors.initials: K
authors.lastname: Mutabagani
authors.forename: Steven
authors.initials: S
authors.lastname: Teich
mesh_terms: D001934:Branchial Region / Q000002:abnormalities*; D003560:Cysts / Q000000981:diagnostic imaging / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D007223:Infant; D013961:Thyroid Gland / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D014463:Ultrasonography