title: Heterotopic pregnancy: a rare cause of hemoperitoneum and the acute abdomen.
abstract: BACKGROUND
  Heterotopic pregnancy is the rare coexistence of intrauterine and extrauterine gestation. The incidence may be as high as 1 in 3,889 pregnancies. The diagnosis is difficult to make, but an important one to consider in the presence of acute abdominal pain, hemorrhagic shock, and intrauterine pregnancy.
  
  
  METHODS
  Case report.
  
  
  RESULTS
  Successful treatment of ectopic pregnancy with benign convalescence and viable intrauterine pregnancy delivered at term.
  
  
  CONCLUSIONS
  Every clinician treating women of reproductive age should keep this diagnosis in their differential, especially for pregnant women presenting with abdominal pain and hemoperitoneum.
authors.affiliation: Department of General and Vascular Surgery, Gundersen Lutheran Medical Center, 1900 South Avenue, C05-001, La Crosse, WI 54601, USA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Schroeppel
authors.forename: Shanu N
authors.initials: SN
authors.lastname: Kothari
mesh_terms: D000006:Abdomen, Acute / Q000209:etiology*; D000328:Adult; D003937:Diagnosis, Differential; D005187:Fallopian Tubes / Q000601:surgery*; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006465:Hemoperitoneum / Q000209:etiology*; D006801:Humans; D011247:Pregnancy; D011274:Pregnancy, Tubal / Q000175:diagnosis*
chemical_list: D006454:Hemoglobins