### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
My brother who was a first responder on 9/11 has been vomitting for 3 weeks, fever, chills as well as abdominal pain.  He finally went to the ER last night where they discovered swollen lymph nodes and an enlarged spleen.  They released him and told him to follow up asap with family doctor.   He is a terrible patient and hates to see any doctor.  I am worried about the many cancers associated with 9/11.  any suggestions would be greatly appreciated.Thank in advance,Kerry

### output:

Hi and welcome to Chat Doctor. Thank you for your query. I am Chat Doctor, I understand your concerns and I will try to help you as much as I can. In your case it looks like infectious cause. Generally enlarged spleen is called splenomegaly and there are various causes possibly leading to this. In first case these are infections such as mononucleosis Parasitic infections, such as toxoplasmosis or Bacterial infections. It means that any infection in your body may lead to spleen enlargement.  Second most common causes include autoimmune diseases such as thrombocytopenia. If this is ruled out by specific tests then some other causes may be considered and some are more or less serious such as Leukemia Lymphoma, or noninflammatory diseases such as acidosis, lupus, and rheumatoid arthritis. In every case, infectious causes are treated with antibiotics and other causes may require surgical removal of spleen. I hope I have answered you query. If you have any further questions you can contact us in every time. Kindly regards. Wish you a good health.