title: A low-grade chondrosarcoma presenting as an unusual cervical mass in the hyoid bone: a case report.
abstract: BACKGROUND
  A chondrosarcoma originating from the hyoid bone is very rare. Here, we describe a case of low-grade chondrosarcoma of hyoid origin and discuss its preoperative imaging features, including those on positron emission tomography-computed tomography, and its recurrence rate.
  
  
  METHODS
  A 42-year-old Japanese man noticed a mass in the right submandibular region of his neck. A hard 3.0 × 2.8 cm tumor was noted on the right side of his hyoid bone. The mass was immobile and moved with deglutition.
  
  
  CONCLUSIONS
  Even though radiographic studies, including positron emission tomography-computed tomography, were inconclusive, the cartilaginous tumor was surgically removed en bloc, and the tumor was diagnosed based on the results of pathological investigations. Close follow-up is recommended in such cases due to the potential for recurrences, because local recurrence occurred in 50% of the reported cases of grade one chondrosarcomas.
authors.affiliation: Department of Otolaryngology, Head and Neck Surgery, University of Toyama, Toyama, Japan. hfushiki@med.u-toyama.ac.jp.
authors.forename: Hirohiko
authors.initials: H
authors.lastname: Tachino
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Fushiki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Ishida
authors.forename: Yukio
authors.initials: Y
authors.lastname: Watanabe