正常未骨化甲状腺软骨的计算机断层扫描表现：对肿瘤侵犯诊断的意义
Computed tomography appearance of normal nonossified thyroid cartilage: implication for tumor invasion diagnosis.
作者信息
Dadfar Nazanin, Seyyedi Mohammad, Forghani Reza, Curtin Hugh D
机构信息
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.
出版信息
J Comput Assist Tomogr. 2015 Mar-Apr;39(2):240-3. doi: 10.1097/RCT.0000000000000196.
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.
目的
本研究的目的是确定非骨化甲状腺软骨（NOTC）在对比增强计算机断层扫描（CT）上的密度和均匀性，为未来使用双能CT评估软骨侵犯提供初步信息。
方法
对100例正常喉部CT扫描进行NOTC密度和均匀性评估。
结果
所有病例中NOTC密度均均匀。非骨化甲状腺软骨的平均密度高于相邻肌肉，但存在重叠。47例中，在骨化与NOTC交界处观察到透亮区，但不在NOTC本身内部。11例中，仅在甲状腺软骨的1个皮质观察到骨化。7例中，前联合处软骨未骨化。
结论
非骨化甲状腺软骨在对比增强CT扫描上外观均匀，但显示出一些可能被误报为肿瘤侵犯的正常变异。
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