A case of rectal endometriosis misdiagnosed as rectal malignancy on three colonoscopies and biopsies sharing a combined literature review

Abstract

Endometriosis involves the intestine, and its clinical manifestations are nonspecific and lack of etiological manifestations. The diagnosis is difficult, which often leads to misdiagnosis. We report a case of endometriosis which was misdiagnosed as intestinal malignant tumor after colonoscopy and three biopsies.