title: Endometriosis of the appendix with decidual polyp formation: a rare cause of acute appendicitis during pregnancy.
abstract: We report a case of a 28-year-old female, Grava 2, Para I, Ab. 0, who presented acute abdominal pain on the 21st week of her gestation. A diagnosis of acute appendicitis was entertained and an appendectomy performed. The pathologic specimen revealed an inflamed appendix with endometriosis and a marked decidual reaction. A decidual polyp, which occluded most of the appendiceal lumen, is proposed as a rare cause of acute appendicitis during pregnancy.
authors.affiliation: Department of Pathology and Laboratory Medicine, Universidad Central del Caribe School of Medicine, Bayamón PR 00960-6032, USA.
authors.forename: I E
authors.initials: IE
authors.lastname: Silvestrini
authors.forename: M A
authors.initials: MA
authors.lastname: Marcial
mesh_terms: D000006:Abdomen, Acute / Q000209:etiology*; D000328:Adult; D001062:Appendectomy; D001064:Appendicitis / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D001065:Appendix / Q000473:pathology; D002429:Cecal Diseases / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D002454:Cell Differentiation; D003656:Decidua; D004715:Endometriosis / Q000150:complications* / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000601:surgery