Recurrent Solitary Fibrous Tumor in Intradural Extramedullary Space: Case Report and Review of the Literature

Table 2

Liu classification for localization of spinal SFTs [13].

Type	Subtype
Type 1: extradural	IA, intracanal type
	IB, intra- and extracanal type
Type II: intradural	IIA, extramedullary type
	IIB, intramedullary invasion type
Type III: intra- to extradural and paravertebral type