Gliomatosis peritonei is the deposition of benign glial implants, more commonly associated with an immature ovarian teratoma. This paper reports a case of a 24 year old gravida 1 para 1 (1001) who underwent unilateral salpingo-oophorectomy and complete surgical staging for a preoperative diagnosis of ovarian new growth, probably malignant. Intraoperatively, aside from the ovarian mass on the right, there was also note of an omental mass. Histopathology revealed a mature ovarian teratoma for the ovary and gliomatosis peritonei for the omental mass. Gliomatosis peritonei is a rare entity. There are currently no guidelines on how patients with this condition can be followed up. Transvaginal sonography and annual measurement of alpha-fetoprotein may play a role in the follow-up of patients in low resource settings.