Hi ! Good morning . I am Dr Shareef answering your query. From the history of trauma, it seems that he developed a hematoma at that time, which did not resolve, and is in the way of getting organised. However, it can be firmly said only by a clinical examination. If I were your doctor, I would clinically examine him, stop all the blood thinning agents if he was on it after consulting his treating physician, go for a clotting profie and also advise a CT scan of the area if need be to be sure of the diagnosis before planning the management. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.