I am type 2 diabetic, and have been for 5 years i take 500mg metformin twice daily, about 18 months ago i noticed a swelling in my neck next to my thyroid. After seeing a specialist a couple of times, and having a couple of needle aspiration tests they could,nt make their minds up what the lump is, so now i have got to have an operation to remove the left lobe of my thyroid and the lump which is increasing in size. Can diabetics be more susceptible to thyroid problems,or is it just a case of bad luck :?: