- most commonly - endometriotric deposits are multiple small (<1cm) raised
blue-black nodules - they appear as if ink has been injected under the peritoneum.
If the condition is severe then the nodules may be larger and surrounded by
variable amounts of fibrosis
- other 'atypical/subtle' lesions commonly seen include red implants (petechial,
vesicular, polypoid, haemorrhagic, red flame-like) and serous or clear vesicles
- involvement of the ovary may lead to the formation of an endometrioma (chocolate
- deep infiltrating nodules extend more than 5mm below the peritoneal surface
and may penetrate or adhere to other structures (eg. bowel, bladder, ureters,
- extensive pelvic damage due to fibrosis and adhesions may occur in chronic
- microscopically endometriotic deposits contain glands and stroma. There is also a variable amount of fibrosis and bleeding. The endometriotic deposits may be out of phase with the woman's menstrual cycle. However, like normal endometrial tissue, the deposits decidualize during pregnancy
- (1) RCOG (2006) The investigation and management of endometriosis. Royal College of Obstetricians and Gynaecologists.
Last reviewed 01/2018