In a chronic smoker which hemoptysis, he also gave a history of hypeension and obesity. Lab data showed raised ACTH levels, which are not suppressed by dexamethasone. The cause of Cushing's syndrome in the patient is -
High-Yield Explanation
- History of chronic smoking and hemoptysis along with raised ACTH levels not suppressible by dexamethasone points to ectopic ACTH producing small cell carcinoma of lung.