Which clinical findings are characteristic of endometrioma?

Updated: Dec 14, 2018
  • Author: Shawn Daly, MD; Chief Editor: Eugene C Lin, MD  more...
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When the ovaries are involved, they can become enlarged with cystic, blood-filled spaces that, on gross examination, are termed chocolate cysts, or endometriomas. Endometriomas can become large and multilocular. The endometrial-cell lining can become obliterated over time, making the pathologic distinction between an endometrioma and a hemorrhagic cyst difficult in some cases. [7] The wall of the endometrioma becomes thickened and fibrotic, with hemosiderin deposition. [9] The high concentration of iron in the cysts causes the distinctive appearance on MRI [10] and has been proposed to relate to the induction of carcinomas in endometriosis that form in some patients. [9, 11]

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