<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, I have a small hard lump right above my collarbone on the left side of neck? It didnt bother me still I started messing with it and I didnt know it was there till I was playing with my seatbelt on day driving. I does move side to side when I touch it. Could it be a fatty tissue?  <response>: Welcome to Chat Doctor .1. It looks like lipoma fat content ganglion cystic - fluid containing Bone extending from the bone.2. If it does not cause any symptoms discomfort and not causing any cosmetic problem you can ignore until you visit your doctor for any cause.3. If you want to get removed then - in this case I would ask for an ultrasound scan to find out the content of the lesion, and x-ray chest and a picogram to rule out any bonylung related pathology.4. So, Its for you to decide how to proceed.5. Anything to ask ? Do not hesitate. Thank you. 