<s>[INST] My eight year old son has a large, firm knot that is growing on top of his right bicep. It is not red, it is not painful, there s no fever or trauma to his arm, it s been checked out and is determined that it s not a sist or just fatty tissue. They say it may be osteomyelitis, but he does not have any of the symptoms. Does anyone know anything else that could be going on? What are your thoughts?? [/INST] HI, Welcome with your query to Chat Doctor. Based on the facts of your query, In my opinion you need to check out the diagnosis before planning the treatment of your sons' biceps knot, with your Surgeon for a Second Opinion. Confirm the ambiguity of the cause of the lump. Xray of the shoulder / and or / USG / CT Shoulder /biceps area and FNAC Biopsy with Homeopath study would fix the cause from your Surgeon. There are many causes like -Sarcoma Granuloma/Fibrous/periosteal tumors/Erythema Nodes/ which need to be ruled out. As the fever /pain is not there, your case becomes more challenging and would need a team of doctors-Surgeon/Orthopedic/Physician to fix the diagnosis. Such a lump after proper diagnosis could be treated by your doctor according to its cause. Hope you got the answer for your query. Hope this would help you. Welcome for any further query in this regard Will appreciate writing your feedback review comments, to help the needy patients like you at Chat Doctor. Good Day!! Chat Doctor. S. Genl-CVTS </s>