A 16 y/o female presents to your clinic with manifestation of Cushing syndrome. Which of the two organ systems will need to be included in your work

A 16 y/o female presents to your clinic with manifestation of Cushing syndrome. Which of the two organ systems will need to be included in your work up to identify the etiology of this syndrome?

A. posterior pituitary and adrenal medulla

B. posterior pituitary and hypothalamus

C. anterior pituitary and adrenal cortex

D. Adrenal medulla and hypothalamus