Table 1. Number of proteins identified in thyroid cystic fluids and PTC cell secretomes.

Thyroid cystic fluid or PTC cell lines	No. of identified proteinsa	FDRb
Benign cystic fluid	346	0.58%
PTC cystic fluid	488	1.23%
BHP 7-13	830	0.12%
CGTH W-3	1921	0.21%

^aThe numbers represent identified proteins for which at least two unique peptides of 95% peptide possibility and 95% protein possibility were identified using the Scaffold software.

^bThe false discovery rate (FDR) was calculated as the ratio of the spectra assigned to a random database over those assigned to a normal database.