Deep endometriosis with pericolic lymph node involvement: A case report and literature review

Figure 1 Double-contrast barium enema examination. Endometriosis implant in sigmoid colon: extrinsic compression with protruding polypoid appearance and mucosal pleating.

Figure 2 Magnetic resonance imaging shows two hypointense nodular implants of endometriosis infiltrating the proximal sigmoid wall and the utero-vesical fold, with the latter retrospectively recognized after the surgery (arrows). The presence of high signal intensity foci within the nodules is due to hemorrhagic foci.

Figure 3 Histology of the sigmoid wall showing endometrial tissue in the muscular layer.

Figure 4 Lymph node endometriosis with a cystic glandular pattern. A: Hematoxylin/eosin stain × 200; B: CD10 immunostaining × 200; C: Estrogen receptor immunostaining × 200; D: Progesterone receptor immunostaining × 200. A BX-51 Olympus microscope connected to a computer by a color CCD camera was used to obtain and edit histology images. The analySISB software (Olympus) was used to acquire images at different magnifications.