Paraneoplastic Syndrome is a term used to describe a group of rare medical conditions that occur when cancerous cells in the body produce proteins or other hormones that affect normal body functions. There are several synonyms for this condition, including metastatic symptoms, cancer-related symptoms, and remote effects of cancer. Other terms used to describe this syndrome include Oncologic-related neurological syndrome, Paraneoplastic neurologic syndrome, and Paraneoplastic autoimmune syndrome. The symptoms of Paraneoplastic Syndrome can vary widely, depending on which part of the body is affected. Some common symptoms include weight loss, fatigue, joint pain, and difficulty breathing, among others. It's important to get a proper diagnosis as soon as possible, as treatment can vary depending on the type and severity of the Paraneoplastic Syndrome.