Conversation: The conversation between human and AI assistant.
[|Human|] was just looking on line regarding lumps.  my daughters boyfriend had one on his chest that was diagnosed as an inflamed lymph node & nothing to worry about.  now he has one between his sternum & belly button.  he & my daughter are very concerned.  he is sched for an ultrasound this week and an appointment with a surgeon next week.  causes?
[|AI|]  Hello and welcome to Chat Doctor, Lymph node enlargement occurs due to infection, inflammation, or neoplasm. An enlarged lymph node between chest and belly button can also be due to infection, inflammation or neoplasm. Ultrasound of the abdomen will help to know the site of lymph node and its relation with surrounding structures. If the lymph nodes are superficial enough, aspiration cytology of the lymph nodes can be done under radiological guidance (ultrasonographic or CT scan). In aspiration cytology, material is aspirated from the nodes, spread on glass slide, stained with appropriate stains and viewed under microscope. Further management will depend on the result of the investigations. Thanks and take care Chat Doctor.