Intradural Spinal Lipoma in an Experimental Swine

A lesion designated as an intradural spinal lipoma was characterized by evident origin within the pia mater and by composition of well-differentiated adipose tissue with some fibrous stroma. Increased pial thickness and fibrous proliferation from the pia mater into the underlying neural tissue accompanied the neoplasm. No attachment of this growth to either the arachnoid or the dura mater could be discerned at any site examined. Since arachnoidal cells were not observed as components, the neoplastic tissue was not considered to be a variant of the meningioma.