Table 1.

Keywords used as literature search strategy.

Search-engine	Keywords	Article(n)
PubMED	(“neutrophil-to-lymphocyte ratio"[All Fields] OR “neutrophil-to-lymphocyte ratio"[All Fields] OR “nlr"[All Fields]) AND (((“penil"[All Fields] OR “penis"[MeSH Terms] OR “penis"[All Fields] OR “penile"[All Fields]) AND (“carcinoma"[MeSH Terms] OR “carcinoma"[All Fields] OR “carcinomas"[All Fields] OR “carcinoma s"[All Fields])) OR (“penile neoplasms"[MeSH Terms] OR (“penile"[All Fields] AND “neoplasms"[All Fields]) OR “penile neoplasms"[All Fields] OR (“penile"[All Fields] AND “cancer"[All Fields]) OR “penile cancer"[All Fields]) OR (“penile neoplasms"[MeSH Terms] OR (“penile"[All Fields] AND “neoplasms"[All Fields]) OR “penile neoplasms"[All Fields] OR (“penis"[All Fields] AND “neoplasms"[All Fields]) OR “penis neoplasms"[All Fields]))	12
Scopus	TITLE-ABS-KEY ((“neutrophil two lymphocyte ratio” OR “neutrophil-two-lymphocyte ratio” OR nlr) AND (penile AND carcinoma OR penile AND cancer OR penis AND neoplasms))	18
Science-direct	(“neutrophil to lymphocyte ratio” OR “neutrophil-to-lymphocyte ratio” OR nlr) AND (penile carcinoma OR penile cancer OR Penis neoplasms)	92
		122