Figure 2
From: Endometriosis involving the mucosa of the intestinal tract: a clinicopathologic study of 15 cases
(a) Polypoid endometriosis (H&E, 20 × ). (b) Crypt architectural distortion caused by underlying endometriosis (H&E, 100 × ). (c) Prolapse-type changes induced by adjacent mucosal endometriosis (not shown) (H&E, 200 × ). (d) Intravascular endometriosis (H&E, 200 × ). (e and f) Stromal endometriosis. (e) Cellular spindle cell proliferation in the lamina propria of the colon (H&E, 20 × ). (f) CK7/ER double staining. The stroma is strongly positive for ER (brown chromogen), but no CK7-positive (red chromogen) glands are present (CK7/ER double immunoperoxidase stain, 20 × ).
