This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Syndrome of inappropriate ADH secretion is commonly associated with: March 2012 
Select and explain. 
A. Breast carcinoma, B. Ovarian carcinoma, C. Lung carcinoma, D. Hepatocellular carcinoma
C: Lung carcinoma
Answer: C: Lung carcinoma 
Explanation: Ans: C i.e. Lung carcinomaParaneoplastic syndromeParaneoplastic syndromes associated with breast carcinoma are hypercalcemia, dermatomyositis etc.Paraneoplastic syndrome associated with ovarian carcinoma is hypoglycaemiaThe most frequent causes of SIADH include the secretion of ectopic ADH by malignant neoplasms (paicularly small cell carcinomas of the lung), drugs that increase ADH secretion etc.Other paraneoplastic syndromes associated with lungs carcinoma are hypercalcemia (squamous cell carcinoma), cushings syndrome (small cell carcinoma), acanthosis nigricansParaneoplastic syndromes associated with hepatocellular carcinoma are carcinoid syndrome and polycythemia