Stephen J. Schueler, M.D.

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Endometriosis Underlying Cause

The most common sites for endometriosis include:

  • Outside surface of the uterus
  • Ovaries
  • Bladder
  • Colon
  • Rectum
  • Lining of the pelvis

The cause of endometriosis is unknown. However, a number of theories may help explain the growth of endometrial cells outside the uterus.

Theories include:
  • Endometrial cells may spread from the uterus, through the fallopian tubes, and into the pelvis, where they attach to the surface of other organs.
  • The lymphatic system may carry endometrial cells to other structures inside the pelvis.
  • Cells that line other organs inside the pelvis transform into endometrial cells.

Continue to Endometriosis Anatomy

Last Updated: Jan 9, 2009 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
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PubMed Endometriosis References
  1. Moore J, Copley S, Morris J, Lindsell D, Golding S, Kennedy S. A systematic review of the accuracy of ultrasound in the diagnosis of endometriosis. Ultrasound Obstet Gynecol. 2002 Dec;20(6):630-4. [12493057]
  2. Schroder AK, Diedrich K, Ludwig M. Medical management of endometriosis: a systematic review. IDrugs. 2004 May;7(5):451-63. [15154107]
  3. Wykes CB, Clark TJ, Khan KS. Accuracy of laparoscopy in the diagnosis of endometriosis: a systematic quantitative review. BJOG. 2004 Nov;111(11):1204-12. [15521864]
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