Endometriosis is a benign yet chronic gynecologic condition that, in rare cases, may undergo malignant transformation. Although endometriosis-associated malignancies most commonly arise in the ovary, extragonadal sites may also be …
Endometriosis-associated intestinal tumors (EAITs) are rare malignancies that arise from ectopic endometrial tissue, and their clinical and molecular characteristics remain poorly defined.
A woman in her seventies presented with mucous hematochezia. Colonoscopy revealed a poorly differentiated adenocarcinoma in the upper rectum. Immunohistochemical staining showed CK7 positivity and CK20/CDX2 negativity, findings atypical for …