1161 / 1778
Vulvar SCC and nonsuspicious (N0-1) inguinal nodes
groin dissection
5/25 (20.0%) N+
groin radiation
vulvectomy
Relapse :
0/25
5/27 (18.7%)
Study closed after interim analysis of 58 patients
Stehman et al. Int J Radiat Oncol Biol Phys 24:389–96;1992