<prompt> The most common paraneoplastic syndrome associated with lung cancer?SIADHCushings syndromeHypercalcemiaPolycythemia  <response>: Most common paraneoplastic syndrome: Hypercalcemia Most common endocrinopathy in paraneoplastic syndrome: Cushing syndromeMost common carcinoma associated with Cushing syndrome: Lung carcinomaThe cancer patients develop Cushing syndrome due to excess production of pro-opiomelanocoin and coicotrophin.Most common paraneoplastic syndrome in squamous cell lung carcinoma: HypercalcemiaMost common paraneoplastic syndrome in small cell lung carcinoma: SIADHSince among all lung cancers, squamous cell carcinoma is common than small cell carcinoma, Most common paraneoplastic syndrome in lung cancer is HypercalcemiaRef: Robbins 8e p321 