Conversation: The conversation between human and AI assistant.
[|Human|] Hi. My baby is 9 1/2 months and weve found a 3cm lump under his left armpit. We did a ultrasound and they dont know what it is. Its not a cyst or lymph gland either. Im worried cause my baby is fit and healthy and this lump was a bit of a shock to us. What could it be?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern.  He has some soft tissue tumor like lipoma or some enlarged lymph node.  He should go for fine needle aspiration cytology or biopsy of that lump. It will give you exact diagnosis. Then he 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.