In a chronic smoker with mild haemoptysis. He also gave a history of hypeension and obesity. Lab data showed raised ACTH levels, which were not suppressed by dexamethasone. The cause for the Cushing's syndrome ha the patient is -
ectopic ACTH production is not suppressed by high dose of dexamethasone (Harrison 17 pg 2256)
MEN I
Pituitary adenoma
Adrenal coical adenoma
Ectopic ACTH secreting tumor
Endocrinology