Final answer:
Paraneoplastic syndromes are associated with tumors and can affect distant parts of the body. They can be caused by hormones released from endocrinologically active tumors or have an unknown cause. Examples of paraneoplastic syndromes include Cushing's syndrome and hyperthyroidism.
Step-by-step explanation:
Paraneoplastic syndromes are syndromes associated with tumors that may affect distant parts of the body. These syndromes can be caused by hormones released from endocrinologically active tumors, or their exact cause may be unknown. Paraneoplastic syndromes can present with a variety of symptoms, ranging from neurological symptoms to weight loss and anemia. Some examples of paraneoplastic syndromes include Cushing's syndrome, which is characterized by excessive production of cortisol, and hyperthyroidism, which is characterized by overproduction of thyroid hormones.