HISTORY:
                   74 years old female with  a liver mass.
                    
                   Her past medical history is  significant for transitional cell carcinoma of the ureter and a  small 1-2 cm mass of her right upper arm.
                    
                    
                 
						
                         
			             
                         
			           
                                   
                        
                          
			            
			           
                
                    
                 
                            What is the most likely diagnosis?
                            
                                - GIST
 
                                - Malignant PEComa 
 
                                - Melanoma
 
                                - Angiomyolipoma
 
                          
                               
                            
                            
                         
                        
                         
                            
                    Malignant PEComa (perivascular epithelioid cell tumor)