Paraneoplastic Syndromes
In a significant number of cases, small cell carcinomas can produce ectopic hormones, including adrenocorticotropic hormone (ACTH) and anti-diuretic hormone (ADH). Ectopic production of large amounts of ADH leads to syndrome of inappropriate antidiuretic hormone hypersecretion (SIADH).
Lambert-Eaton myasthenic syndrome (LEMS) is a well-known paraneoplastic condition linked to small cell carcinoma.
Read more about this topic: Small-cell Carcinoma