<human>: hi i have a hard lump,(feels like bone) about half a golf ball in size just below left hand side of my knee, left leg, i have felt it start to take shape 12 months ago, but resently it has become much larger, as well now gives me some pain..any ideas?? 33 year old male
<bot>: Hi, dairy have gone through your question. I can understand your concern. You may have some hematoma formation followed by calcification or new bone formation.  You should go for x-ray knee to know exact location and plan of that mass.  Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health.