Sherri
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        I have been diagnosed with hypothyroidism and recently underwent a MRI and CT scan.  A small mass was found and my doctor said it was probably from taking "lithium" and not to worry about it.  No other tests or biopsy were done. I feel like there should be more examinations to determine if it really is caused by lithium.  It has been 10 years since I took lithium.  Has anyone who has taken lithium had this problem?  Any information concerning a nodule or small mass in the thyroid area would be greatly appreciated.