Vaginal cancer diagnosed during pregnancy presenting a therapeutic dilemma: A case report

•Vaginal cancer is very rare and generally only occurs in the elderly.•Stage I vaginal cancer was diagnosed in a 38-year-old patient at 13 weeks of gestation after tumor removal.•After refusing an abortion and radical surgery, the patient continued with pregnancy.•The tumor recurred and invaded the surrounding tissue, the baby was delivered, and the patient began radiation therapy.•The patient passed away 8 months after delivery due to deterioration.