A cohort study among 402 patients with penile cancer in Maranhão, Northeast Brazil with the highest worldwide incidence. - Vieira, Ciro Bezerra; Teixeira-Júnior, Antonio; Feitoza, Laisson; Pinho, Jaqueline; Calixto, José; do Nascimento, Francisco Sérgio Moura Silva; Campos, Marcos Adriano Garcia; Lages, Joyce; Junior, Antonio Machado Alencar; Soares, Fernando; Cunha, Isabela; Silva, Gyl Eanes Barros (BMC Research Notes, 2020)