<s>[INST] My father is 60 years old he lives with me,he woke up this morning with a large lump,the size of a orange cut in two on his right upper buttocks close to the belt line,it isnt painfull I can push on it put he says it doesnt hurt,in feels soft at the surface like it should but when pressed on I feel a semi hard lump,the only clue I have is that about a month ago he fell on that same buttock,bruised it X-ray came out fine and it healed now out of the blue this,Im stumped please help me decide what to do, sincerely Shannon [/INST] Hi ! Good morning. I am Chat Doctor 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 organized. 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 profit 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 Chat Doctor to clear doubts on your health problems. Wishing you an early recovery. Chat Doctor. </s>