Table 6: Diagnosis of Pituitary Excess Hormone Secretion

ACTH = Adrenocorticotropic hormone; CRH = Corticotropin-releasing hormone; FT₄ = Thyroxine; FSH = Follicle-stimulating hormone; GH = Growth hormone; IGF-1 = Insulin-like growth factor-1; LDDST = Low-dose dexamethasone suppression test; LH = Luteinizing hormone; OGTT = Oral glucose tolerance test; PRL = Prolactin; T₃ = triiodothyronine; T₄ = Thyroxine; TSH = Thyroid-stimulating hormone; UFC = Urinary free cortisol

Table 6:
Diagnosis of Pituitary Excess Hormone Secretion
Axis	Tests
PRL	Prolactin
GH	IGF-1, OGTT
ACTH	24-h UFC, LDDST, LDDST/CRH test, midnight salivary and serum cortisol
Gonadotropins (LH and FSH)	FSH, LH, α- and ß-subunits
TSH	FT₄ index (free T₄), T₃, TSH
ACTH = Adrenocorticotropic hormone; CRH = Corticotropin-releasing hormone; FT₄ = Thyroxine; FSH = Follicle-stimulating hormone; GH = Growth hormone; IGF-1 = Insulin-like growth factor-1; LDDST = Low-dose dexamethasone suppression test; LH = Luteinizing hormone; OGTT = Oral glucose tolerance test; PRL = Prolactin; T₃ = triiodothyronine; T₄ = Thyroxine; TSH = Thyroid-stimulating hormone; UFC = Urinary free cortisol