title: A foetiform teratoma.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D010048:Ovarian Cysts / Q000150:complications; D010051:Ovarian Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000473:pathology; D011247:Pregnancy; D011271:Pregnancy, Ectopic / Q000175:diagnosis*; D013724:Teratoma / Q000175:diagnosis* / Q000473:pathology