Image Quiz: Polyuria in a Pomeranian with a history of hair cycle arrest, Answer D
The results of the low-dose dexamethasone suppression test confirm pituitary-dependent hyperadrenocorticism (i.e. 4-hour cortisol concentration < 50% of baseline and 8-hour cortisol > 1.4 µg). Further diagnostics are not necessary. Starting therapy with trilostane is, therefore, the most appropriate option for this patient.