title: Papillary thyroid carcinoma on sonography.
abstract: OBJECTIVE
  The purpose of this study is to investigate the characteristics of papillary thyroid carcinomas (PTCs) on color duplex sonography (CDUS).
  
  
  METHODS
  We retrospectively reviewed 115 nodules (104 patients) with PTC confirmed by pathology from February 1, 2005, to August 31, 2008. The size, border, calcification, echotexture, hemodynamics (peak systolic velocity and resistance index) of the thyroid nodules and cervical lymph nodes on CDUS were analyzed.
  
  
  RESULTS
  There was a close relationship between the size of the nodule and the vascularity of the thyroid carcinoma (P=.000). Microcalcification increased the suspicion for malignancy of the thyroid nodule. A hypoechoic thyroid nodule with abundant internal vascularity, ill-defined border and microcalcification was highly suggested PTC.
  
  
  CONCLUSIONS
  CDUS plays an important role in the early detection of PTC and cervical lymph node metastasis, which would provide surgeons with valuable information for planning surgical intervention. Mastering manifestations of PTC on CDUS will improve the accuracy in the diagnosis of PTC. CDUS-guided fine needle aspiration of the thyroid nodule is the standard in the diagnosis of thyroid carcinoma and metastasis pre- and postthyroidectomy.
authors.affiliation: Department of Ultrasonography, Shenzhen Second Hospital, Shenzhen, China. liquanshui@sohu.com
authors.forename: Quan-shui
authors.initials: QS
authors.lastname: Li
authors.forename: Sheng-hua
authors.initials: SH
authors.lastname: Chen
authors.forename: Hua-hua
authors.initials: HH
authors.lastname: Xiong
authors.forename: Xiao-hua
authors.initials: XH
authors.lastname: Xu
authors.forename: Zhen-zhou
authors.initials: ZZ
authors.lastname: Li
authors.forename: Guo-qiang
authors.initials: GQ
authors.lastname: Guo
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002291:Carcinoma, Papillary / Q000000981:diagnostic imaging*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*; D018616:Ultrasonography, Doppler, Duplex / Q000379:methods*; D055815:Young Adult