- Author:
	        		
		        		
		        		
			        		Ana Catarina CARVALHO
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Ricardo CARDOSO
			        		
			        		;
		        		
		        		
		        		
			        		Francisco PIRES
			        		
			        		;
		        		
		        		
		        		
			        		Sofia VENTURA
			        		
			        		;
		        		
		        		
		        		
			        		Francisco PORTELA
			        		
			        		;
		        		
		        		
		        		
			        		Paula MINISTRO
			        		
			        		;
		        		
		        		
		        		
			        		Américo SILVA
			        		
			        		
		        		
		        		
		        		
			        		
			        		Author Information
			        		
 - Publication Type:CASE REPORT
 - From:The Korean Journal of Gastroenterology 2023;81(1):46-51
 - CountryRepublic of Korea
 - Language:English
 - Abstract: Endometriosis is a relatively common gynecological condition in women of reproductive age. The rectosigmoid region is the most commonly affected segment when the gastrointestinal tract is involved. A differential diagnosis of colorectal neoplasia is difficult because of the similar clinical, endoscopic, and radiology findings. A 42-year-old female presented with abdominal distention and was subsequently diagnosed with a large bowel obstruction in the rectum. A temporary colostomy was performed, and endoscopy revealed a rectal mass obstructing the rectum. The biopsy showed normal mucosa, and it was difficult to exclude rectal malignancies even after the imaging workup. Endoscopic ultrasound demonstrated a hypoechoic lesion below the rectal mucosa, and fine needle aspiration confirmed the diagnosis of bowel endometriosis. Bowel endometriosis is a challenging diagnosis. Endoscopic ultrasound-guided fine-needle aspiration is useful for acquiring adequate samples for histological confirmation and a definitive diagnosis of bowel endometriosis.
 
            
