Angio fibroma is classified as what stage if it extends to one or more paranasal sinuses

Staging of angiofibromaRadkowski Classifications:I ALimited to nose and/or nasopharyngeal vaultBExtension into 1 paranasal sinusIIAMinimal extension through sphenopalatine foramen intosphenopalatine/pterygomaxillary fossaBFills sphenopalatine fossa bowing the posterior wall of themaxillary antrum anteriorly or extending into the orbit theinferior orbital fissure.CExtends beyond sphenopalatine fossa into infratemporal fossaIllAErosion of skull base-minimal intracranial extensionBErosion of skull base-Extensive intracranial extension with orwithout cavernous sinus invasion.