Influence of presence/absence of thyroid gland on the cutoff value for thyroglobulin in lymph-node aspiration to detect metastatic papillary thyroid carcinoma

Table 3 Evaluation of metastatic PTC according to the diagnostic modality

Modalities	SN	SP	PPV	NPV	AC
FNAC	89.2% (99/111)	100%(85/85)	100%(99/99)	87.6%(95/107)	93.9%(184/196)
Tg-FNA^a	95.5%(106/111)	100%(85/85)	100%(106/106)	94.4%(85/90)	97.4%(191/196)
FNAC + Tg-FNA^b	99.1%(110/111)	100%(85/85)	100%(110/110)	98.8%(85/86)	99.5%(195/196)

Abbreviations: SN sensitivity; SP specificity; PPV positive predictive value; NPV negative predictive value; AC accuracy
^aOptimal cutoff value for Tg-FNA is 55.99 ng/mL for patients with thyroids and 9.71 ng/mL for patients without thyroids
^bPositive result was determined if the positive criteria were met in either criteria

ISSN: 1471-2407