NBME 20 Answers ↦
They tried to confuse us saying both low dose and high dose dexamethasone didnt suppress it. But when ACTH is low you dont even need to do high dose dexamethasone test. The high dose is only to differentiate between Pituitary adenoma and ectopic ACTH production
@champagnesupernova3 fuck they got me
They got me on that question as well. I thought it was ectopic ACTH production due to some paraneoplastic syndrome and this is why Low/ high dose dexa is unable to suppress it.
Thanks @dickass, not sure why you got downvoted :(