The iatrogenic form of Cushing syndrome is caused by:
A) Long-term cortisone therapy
B) Pituitary tumor secreting ACTH
C) Benign or malignant adrenal tumor
D) Ectopic ACTH-secreting lung tumor
Ans: A
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Three important forms of Cushing syndrome result from excess glucocorticoid production by the body. One is a pituitary form, which results from excessive production of ACTH by a tumor of the pituitary gland, called Cushing disease. The second form is the adrenal form, caused by a benign or malignant adrenal tumor. The third form is ectopic Cushing syndrome, caused by a nonpituitary ACTH-secreting tumor, often carcinoma of the lung. Iatrogenic Cushing syndrome results from long-term therapy with one of the potent pharmacologic preparations of glucocorticoids.
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