Fig. 2

Initial (a, b, c) and 3.5-year follow-up (d, e, f) T2-weighted magnetic resonance imaging (MRI) of extradural intraspinal cysts in a German Shepherd dog. a: left parasagittal image showing a large extradural cyst at L7-S1 seen at the first lumbosacral MRI. The level at which the transverse images for b and c were obtained is represented by lines identified with corresponding letters. b: transverse image showing bilateral cysts (arrows) at L7. c: transverse image obtained at the level of the endplate of L7 showing the same cysts seen on b. d: left parasagittal image on follow-up showing at which level the transverse images for e and f were obtained (corresponding lines). Note the large cyst seen on a is no longer visible in this location. e, f: transverse images at approximately the same level as b and c. Note there was a reduction in size of both cysts. R, right