Association of Ki-67 Labelling Index and IL-17A with Pituitary Adenoma

Table 2

Hardy classification, modified by Wilson [21].

Grades	Sellar floor erosion	Extrasellar extensions
		Suprasellar extension		Parasellar extension
		A	B	C	D	E
Grade I	Sella normal or focally expanded; tumor < 10 mm	PA expanding into the suprasellar cistern	Anterior recesses of the third ventricle obliterated	The floor of the third ventricle grossly displaced	An intracranial extension into the anterior, middle, or posterior fossa (intradural)	An intracranial extension into or beneath the cavernous sinus (extradural)
Grade II	Sella enlarged; tumor ≥ 10 mm
Grade III	Localized sellar perforation
Grade IV	Diffuse destruction of the sellar floor