A Rare Case of Intestinal Low-Grade Endometrial Stromal Sarcoma With Glandular Differentiation and Associated Endometriosis.

Endometrial stromal sarcoma is a rare tumour. It is even rarer to find it arising in the background of endometriosis in an extrauterine location. This case report describes a case of missed diagnosis of intestinal extra-uterine endometrial stromal sarcoma associated with endometriosis, and the subsequent presentation with distant metastases. The potential pitfalls are highlighted and differential diagnoses are discussed.