Table 2.

Inadequate FNA.

Authors	Inadequate cases (%)	Total number of cases
O'Neil et al. [24]	0.7%	697
Nguansangjam et al. [38]	4.2%	190
Rosa et al. [39]	8%	1583
Day et al. [40]	9%	831
Feichter et al. [41]	16.2%	1003
Zarbo et al. [6]	17%	13066
Park and Ham [37]	25.3%	699