<s>[INST] I am a fifty-four year old female and today have noticed a large 2 inch by 1/2 bony lump on the medial end of my clavicle right side. I think it has probably been there a couple of months because I did notice that the area concerned looked different. There is no pain or swelling. Thank you for your response [/INST] Hello! Thank you for the query. If this is hard as a bone, most likely it is a part of your clavicle (there should be similar lump on the other clavicle). In this location there is also a possibility of enlarged lymph nodes. If it's a lymph node, the lump should be rounded and movable. It is usually softer than a bone but still hard. I suggest you to have an ultrasound of this area. If it is a lymph node biopsy should be also done. Hope this will help. Regards. </s>