Medical MCQ-In a chronic smoker with mild haemoptysis. He also gave a history of hypertension and obesity. Lab data showed raised ACTH levels, which were not suppressed by dexamethasone. The cause for the Cushing's syndrome in the patient is -

In a chronic smoker with mild haemoptysis. He also gave a history of hypertension and obesity. Lab data showed raised ACTH levels, which were not suppressed by dexamethasone. The cause for the Cushing’s syndrome in the patient is –

MEN I

Pituitary adenoma

Adrenal cortical adenoma

Ectopic ACTH secreting tumor

Question Category:

Medicine

Correct Answer:

Ectopic ACTH secreting tumor

Description:

Remember this In normal person → Low dose dexamethasone suppresses cortisol secretion. In Cushing's syndromes → Low dose dexamethasone is unable to suppress cortisol secretion. When Cushing's syndrome is caused due to ectopic ACTH production → Even high dose dexamethasone is unable to suppress cortisol secretion.

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