title: Appendiceal Nodules in the Setting of Endometriosis Can Be Carcinoid Tumors.
abstract: BACKGROUND
  Endometriosis is occasionally found in the appendix, particularly in severe forms of deep infiltrating disease. Carcinoid tumor is the most common neoplasm of the appendix and may be overlooked or misdiagnosed when there are multiple endometriosis lesions in the pelvis.
  
  
  METHODS
  We describe two cases of carcinoid tumor diagnosed in patients who underwent surgery to treat endometriosis, in whom the diagnosis of appendiceal endometriosis was presumed.
  
  
  CONCLUSIONS
  In the context of endometriosis, surgery is indicated when the appendix is affected. Despite the more likely diagnosis of appendiceal endometriosis, carcinoid tumors cannot be ruled out by imaging examinations.
authors.affiliation: Department of Obstetrics and Gynecology, University of São Paulo School of Medicine, São Paulo, Brazil.
authors.forename: Igor Leonardo
authors.initials: IL
authors.lastname: Padovesi Mota
authors.affiliation: Hospital Israelita Albert Einstein, São Paulo, Brazil.
authors.forename: Sidney
authors.initials: S
authors.lastname: Klajner
authors.affiliation: RDO Medical Diagnosis, São Paulo, Brazil.
authors.forename: Manoel Orlando
authors.initials: MO
authors.lastname: da Costa Gonçalves
authors.affiliation: Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles.
authors.forename: Leigh J
authors.initials: LJ
authors.lastname: Passman
authors.affiliation: Department of Obstetrics and Gynecology, University of São Paulo School of Medicine, São Paulo, Brazil.
authors.forename: Sergio
authors.initials: S
authors.lastname: Podgaec
mesh_terms: D000328:Adult; D001063:Appendiceal Neoplasms / Q000175:diagnosis*; D001065:Appendix / Q000473:pathology*; D002276:Carcinoid Tumor / Q000175:diagnosis*; D003952:Diagnostic Imaging / Q000379:methods*; D004715:Endometriosis / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008297:Male
keywords: Appendiceal neoplasm; Appendix; Carcinoid tumor; Endometriosis