Nazanin Dadfar1, Mohammad Seyyedi, Reza Forghani, Hugh D Curtin. 1. From the Departments of *Radiology and †Otolaryngology, Massachusetts Eye and Ear Infirmary; and ‡Department of Otology and Laryngology, Harvard Medical School, Boston, MA; and §Department of Radiology, Jewish General Hospital and McGill University, Montreal, Quebec, Canada.
Abstract
OBJECTIVE: The objective of this study was to determine the density and homogeneity of the nonossified thyroid cartilage (NOTC) on contrast-enhanced computed tomography (CT) providing preliminary information for future evaluation of cartilage invasion using dual-energy CT. METHODS: One hundred normal-larynx CT scans were evaluated for the density and homogeneity of NOTC. RESULTS: The density of the NOTC was homogeneous in all cases. Nonossified thyroid cartilage had higher mean density than contiguous muscle, but there was overlap. In 47 cases, a lucent area was observed at the junction of the ossified and NOTC but not within the NOTC itself. In 11 cases, ossification was observed in only 1 cortex of the thyroid cartilage. Cartilage at the anterior commissure was not ossified in 7 cases. CONCLUSIONS: Nonossified thyroid cartilage has a homogeneous appearance on contrast-enhanced CT scans, but showed some normal variations that could be mistakenly reported as tumor invasion.
OBJECTIVE: The objective of this study was to determine the density and homogeneity of the nonossified thyroid cartilage (NOTC) on contrast-enhanced computed tomography (CT) providing preliminary information for future evaluation of cartilage invasion using dual-energy CT. METHODS: One hundred normal-larynx CT scans were evaluated for the density and homogeneity of NOTC. RESULTS: The density of the NOTC was homogeneous in all cases. Nonossified thyroid cartilage had higher mean density than contiguous muscle, but there was overlap. In 47 cases, a lucent area was observed at the junction of the ossified and NOTC but not within the NOTC itself. In 11 cases, ossification was observed in only 1 cortex of the thyroid cartilage. Cartilage at the anterior commissure was not ossified in 7 cases. CONCLUSIONS: Nonossified thyroid cartilage has a homogeneous appearance on contrast-enhanced CT scans, but showed some normal variations that could be mistakenly reported as tumor invasion.
Authors: H Kuno; K Sakamaki; S Fujii; K Sekiya; K Otani; R Hayashi; T Yamanaka; O Sakai; M Kusumoto Journal: AJNR Am J Neuroradiol Date: 2018-01-25 Impact factor: 3.825
Authors: Liucija Weselik; Ewa Majchrzak; Matthew Ibbs; Adam Lewandowski; Andrzej Marszałek; Piotr Machczyński; Wojciech Golusiński Journal: Rep Pract Oncol Radiother Date: 2019-07-30