Evaluation of ultrasound-guided fine needle aspiration biopsy (USG-FNAB) of thyroid nodules: 12 years of accepted diagnostic algorithm in Holycross Cancer Centre (HCC) in Kielce

Material Since year 2000 all FNABs, including thyroid gland, were performed and evaluated according to the accepted diagnostic algorithm. Between 2001 and 2012 FNAB was performed for 26361 patients, in 28079 biopsy sessions with 40815 ultrasonographically selected and biopsied thyroid lesions. Since year 2001, all data about subsequently surgically treated patients along with pathology reports and with previous FNAB data were currently gathered. Each correlated case gained true positive (TP), true negative (TN), false positive (FP) or false negative (FN) status. There were overall 1453 cases of thyroid malignancies of all 10142 correlated FNABs vs. subsequent surgical specimens in CORRELATION DATABASE between 2001-2012. In that period of time there were 343 TP, 1026 TN, 3 FP and 74 FN correlated cases of thyroid malignancies. On the basis of these data, sensitivity, specificity and overall accuracy for thyroid USGFNAB were calculated. Methods On the basis of annual data for true and false cases, overall sensitivity (OS), overall specificity (OSP) and overall accuracy (OA) were estimated. The trend for those values was evaluated.