ABSTRACT
Objective To investigate the MRI features of solitary fibrous tumors(SFT)in the spinal canal.Methods MRI images of 5 cases with pathologically proved STF in the spinal canal were analyzed retrospectively.Results Of 5 lesions,there were 2 in the cervical spine,3 in the thoracic spine;1 in the epidural space and 4 in the subdural extramedullary space.On MRI plain scan,3 lesions showed homogeneous iso-intense signal on T1WI and hypo-intense signal on T2WI,2 lesions showed heterogeneous signal,1 showed patchy hypo-intense signal on T1WI and T2WI at the upper edge of lesion,which had been confirmed as hemorrhage and the other lesion showed internal cystic variation.All of the 5 lesions enhanced on enhancement scan,with moderate enhancement in 2 lesions and significant enhancement in 3 lesions.Cystic and hemorrhagic area were not enhanced.The"dural tail sign"was showed in 3 cases.Conclusion The diagnosis of SFT should be considered when a lesion shows a localized solitary mass in the spinal canal with hypo-intense on T2WI and moderate to significant enhancement.