title: Characteristics of Killian-Jamieson diverticula mimicking a thyroid nodule.
abstract: BACKGROUND
  Killian-Jamieson (K-J) diverticula have been incidentally detected on neck ultrasonography and could be misdiagnosed as thyroid nodules. The purpose of this study was to define the clinical and ultrasonographic characteristics of K-J diverticula.
  
  
  METHODS
  We analyzed 13 patients with K-J diverticula mimicking thyroid nodules including 4 of our patients and 11 previously reported cases between 1984 and August 2009.
  
  
  RESULTS
  Seven patients (54%) were women, and all patients were asymptomatic. The average lesion's diameter was 1.5 cm (range, 0.5-4.0). Most of the lesions (92%) were located in the left thyroid lobe. Ultrasonography showed heterogeneous echogenic masses with echogenic foci and hypoechoic rims. A connection with the adjacent esophageal wall was found in 7 diverticula (54%) at the time of initial diagnosis.
  
  
  CONCLUSIONS
  The K-J diverticula had unique ultrasonographic findings. Awareness of the fact that K-J diverticula can be misdiagnosed as thyroid nodules is important to avoid unnecessary interventions.
authors.affiliation: Division of Endocrinology and Metabolism, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
authors.forename: Hee Kyung
authors.initials: HK
authors.lastname: Kim
authors.forename: Ji In
authors.initials: JI
authors.lastname: Lee
authors.forename: Hye Won
authors.initials: HW
authors.lastname: Jang
authors.forename: So Young
authors.initials: SY
authors.lastname: Bae
authors.forename: Jun Haeng
authors.initials: JH
authors.lastname: Lee
authors.forename: Young-sun
authors.initials: YS
authors.lastname: Kim
authors.forename: Jung Hee
authors.initials: JH
authors.lastname: Shin
authors.forename: Sun Wook
authors.initials: SW
authors.lastname: Kim
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Chung
mesh_terms: D044963:Biopsy, Fine-Needle; D003937:Diagnosis, Differential; D004936:Diverticulum, Esophageal / Q000175:diagnosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D033162:Incidental Findings; D007723:Korea; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D018570:Risk Assessment; D012494:Sampling Studies; D012720:Severity of Illness Index; D016606:Thyroid Nodule / Q000175:diagnosis / Q000000981:diagnostic imaging*; D018608:Ultrasonography, Doppler / Q000379:methods; D016672:Zenker Diverticulum / Q000175:diagnosis / Q000000981:diagnostic imaging*