Endometriosis-associated intestinal tumors: a new challenge in clinical practice.

A 66-year-old female consulted due to headache associated with diaphoresis, constipation, and melena. A urinalysis revealed elevated metanephrines, and colonoscopy identified an extrinsic sigmoid stricture. CT and MRI showed a presacral mass infiltrating the sigma. Scintigraphy and SPECT ruled out a diagnosis of paraganglioma. Based on these findings, the patient was proposed to undergo surgery.