A Case of Concurrent Non-Intestinal Type Adenocarcinoma and Inverted Papilloma in a Maxillary Sinus
	    		
		   		
		   			
		   		
	    	
    	 
    	10.3342/kjorl-hns.2018.00486
   		
        
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Youn Woo KIM
			        		
			        		
			        		
			        			1
			        			
			        		
			        		
			        		
			        		
			        		;
		        		
		        		
		        		
			        		Jung Woo SHIN
			        		
			        		;
		        		
		        		
		        		
			        		Kyu Ho LEE
			        		
			        		;
		        		
		        		
		        		
			        		Seok Won PARK
			        		
			        		
		        		
		        		
		        		
		        		
		        			
			        		
			        		Author Information
			        		
		        		
		        		
			        		
			        		
			        			1. Department of Otorhinolaryngology-Head and Neck Surgery, Dongguk University College of Medicine, Ilsan Hospital, Goyang, Korea. sw43857@dumc.or.kr
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Case Report
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Adenocarcinoma;
			        		
			        		
			        		
				        		Inverted papilloma;
			        		
			        		
			        		
				        		Neoplastic cell transformation;
			        		
			        		
			        		
				        		Paranasal sinuses
			        		
			        		
	        			
        			
        		
 
        	
            
            	- MeSH:
            	
	        			
	        				
	        				
				        		
					        		Adenocarcinoma;
				        		
			        		
				        		
					        		Carcinoma, Squamous Cell;
				        		
			        		
				        		
					        		Cell Transformation, Neoplastic;
				        		
			        		
				        		
					        		Epithelium;
				        		
			        		
				        		
					        		Humans;
				        		
			        		
				        		
					        		Maxillary Sinus;
				        		
			        		
				        		
					        		Middle Aged;
				        		
			        		
				        		
					        		Papilloma, Inverted;
				        		
			        		
				        		
					        		Papillomaviridae;
				        		
			        		
				        		
					        		Paranasal Sinuses
				        		
			        		
	        			
	        			
            	
            	
 
            
            
            	- From:Korean Journal of Otolaryngology - Head and Neck Surgery
	            		
	            		 2019;62(8):465-469
	            	
            	
 
            
            
            	- CountryRepublic of Korea
 
            
            
            	- Language:Korean
 
            
            
            	- 
		        	Abstract:
			       	
			       		
				        
				        	Inverted papilloma is a benign epithelial tumor that arises from the sinonasal epithelium and occurs in 0.5–4% of all sinonasal tumors. Although benign, it is associated with malignant transformation in 2–27% of the cases, with the most commonly accompanying malignant tumor being squamous cell carcinoma. The malignant transformation of inverted papilloma into adenocarcinoma is extremely rare, with two cases reported worldwide to date. Here, along with a literature review, we report a recent case of a 53-year-old man with non-intestinal type adenocarcinoma associated with a sinonasal inverted papilloma. This case shows the possibility of a malignant transformation of inverted papilloma into non-intestinal type adenocarcinoma, which may be associated with human papilloma virus and thus requires further investigation.