Ellen
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Hi, I've just been reading the postings.  My right leg swells when I sit for a while.  This has been happening for 5 years.  Tests (pressure test of leg & ultrasound)have shown nothing.  I now have to have a MRI of the pelvis and right thigh.  Anyone heard of this?  It gets better as soon as I stand and start walking.  Very bothersome, but not painful.