A low grade adenocarcinoma arose in a broad ligament cyst of a 29-year-old woman. The histologic features pointed to a Müllerian rather than mesonephric derivation. It is suggested that some broad ligament cysts and neoplasms may originate from invaginated peritoneal mesothelium derived from the celomic epithelium from which the Müllerian system originates. Thus, there is no need to implicate an embryonal, or specifically, mesonephric remnant in all instances of broad-ligament cysts and neoplasms.
© 1972 The American College of Obstetricians and Gynecologists