What does paraneoplastic syndrome mean?

Paraneoplastic syndrome refers to clinical abnormalities that are not present or invasive, but are associated with the tumor. The most common paraneoplastic syndrome of all cancers is lung cancer, which can be manifested in some patients before the onset of the tumor. The main manifestation is endocrine metabolism disorder. Clubbing, hypertrophic osteoarthrosis, and other skin conditions such as dermatomyositis and acanthosis nigricans in patients with lung cancer, as well as neuromuscular changes, cardiovascular changes, and cardiac arrhythmias, are symptoms associated with tumors that can be relieved if the tumor is eliminated after treatment, but if the symptoms are severe and intolerable, they also require regular intervention and treatment.