<s>[INST] I have a lump about the size of a walnut between my shoulder and neck from an accident.  The accident was several years ago and was quite painful. The lump no longer hurts, but I forgot what the doctor called it.  Can you tell me the name of the injury? [/INST] Hi. The commonest injury in the area is a Fracture Clavicle or shoulder bone. It forms a callus which can be felt as a painless lump in that area. Dr Rishi, New Delhi, India. </s>