title: Ultrasonographic guideline for thyroid nodules cytology: single institute experience.
abstract: OBJECTIVE
  The main issue with the current ultrasonography (US) guidelines is the overestimation of malignant and indeterminate nodules as they do not aid in making decisions to treat patients. To overcome this, new US guidelines for thyroid nodules that have been shown to be better correlated with cytologic results have been proposed. We also suggested specific indications for US-guided fine needle aspiration (FNA) using the new US guidelines.
  
  
  METHODS
  Clinical and pathologic data from 925 patients and 1,419 thyroid nodules were retrospectively collected. All subjects underwent US- and US-guided FNA at Department of Surgery, Wonju Christian Hospital, between March 2010 and July 2011. Sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) were calculated for both the current guidelines and the new guidelines.
  
  
  RESULTS
  The accuracy, sensitivity, specificity, PPV, and NPV for the current guidelines in predicting malignancy were 24.1%, 99.3%, 62.2%, 25.0%, and 99.8%, respectively. The accuracy, sensitivity, specificity, PPV, and NPV for the new guidelines in predicting malignancy were 66.0%, 96.0%, 86.7%, 47.7%, and 99.4%, respectively.
  
  
  CONCLUSIONS
  The use of the new US guidelines allow for a more accurate and specific diagnosis and a better treatment plan than the current guidelines. Additionally, the use of the new FNA guidelines may help prevent unnecessary FNAs and promote cost-effective follow-up for patients.
authors: Department of Surgery, The Armed Forces Capital Hospital, Seongnam, Korea.
authors: Kwang Min
authors: KM
authors: Kim
authors: Joon Beom
authors: JB
authors: Park
authors: Seong Joon
authors: SJ
authors: Kang
authors: Keum Seok
authors: KS
authors: Bae
keywords: Fine needle biopsy; Guideline; Thyroid neoplasms; Ultrasonography
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