Q: Which lung cancer is more prone to produce Syndrome of Inappropriate Antidiuretic Hormone (SIADH)?

Answer: Small cell lung cancer

SIADH is associated with a number of malignancies but most notably with small-cell lung cancer.

SIADH can also occur following head injury, following neck dissection and manipulation of the nervous system, few drugs like morphine, NSAIDs etc and in a number of  other pulmonary processes like pneumonia, abscess, and tuberculosis. It can also occur with endocrine diseases like hypothyroidism and glucocorticoid deficiency.