A neoplasm is an abnormal growth in your body that may be cancerous. If something is “neoplastic,” it has to do with the neoplasm. A paraneoplastic syndrome is a set of symptoms that are caused by a cancer. The symptoms happen in a different area of your body from your cancer.
Most people with cancer don’t get a paraneoplastic syndrome.
Paraneoplastic syndromes are caused by your cancer making hormones or your immune system making antibodies (substances that protect your body against certain infection) that flow through your blood
Paraneoplastic syndromes cause different symptoms depending on the tissues and organs they occur in
About 1 out of 5 people with cancer get a paraneoplastic syndrome—it's most common with lung cancer
The cancer can cause these symptoms without pushing on your nerves or spinal cord.