Correction to: British Journal of Cancer (2015) 112, 1766–1771. doi:10.1038/bjc.2015.141; published online 5 May 2015

Following the publication of this manuscript, the authors have noticed an error in Table 1.

Table 1 AJCC 7th edition N staging system and the modified N staging system

The sixth line, which reads ‘N2 metastasis in multiple or bilateral inguinal lymph nodes & Unilateral or bilateral metastasis in four or more inguinal lymph nodes without ENE, ENE of LNM or pelvic lymph nodes’, should be deleted. The correct table is reproduced below.