Table 1.

Search strategy summary.

Items	Specifications
Date of Search	1 January 2023
Databases and other sources searched	PubMed (Medline)
Search terms used	Search terms: “thyroid FNA” and “pediatric(s)” or “children”
Timeframe	From 1 January 2020 to 31 December 2022
Inclusion and exclusion criteria	Inclusion criteria:
	(1) study was written in English language;
	(2) the full article could be obtained.
	Exclusion criteria:
	(1) study was written in non-English language;
	(2) the full article was not available;
	(3) study was not related to thyroid FNA in pediatrics;
	(4) study was not published in a peer-reviewed journal.
Selection process	The literature review and the data extraction were conducted independently by two reviewers (D.S. and F.P.).
	A secondary search of the literature was manually conducted from the references of our primary search included papers by the application of the same inclusion and exclusion criteria.
	Doubts or disagreements regarding the inclusion or exclusion of manuscripts were resolved through a discussion between the reviewers until a consensus was reached.