Vaginal cancer has a low incidence in the female population. We present the case of a 77-year-old woman who was admitted to the hospital due to postmenopausal vaginal bleeding and initial diagnosis of cancer of the uterine cervix. Vaginal biopsy was performed from an ulcerated exophytic 3 x 2 cm lesion in the superior third of the posterior vaginal wall. Pathology reported a poorly differentiated squamous cell carcinoma of the vagina. The surgical specimen showed an infiltrating, nonkeratinizing, moderately differentiated squamous cell carcinoma of the vagina. We present a case where similarity of symptomatology with cancer of the cervix may have led to a wrong diagnosis or management, due to the anatomical proximity of both tissues.