Abnormally high content of unmyelinated axon profiles in the ventral root L7 of a cat with an abdominal neoplasm.
The ventral roots of L7 of a cat with an intestinal neoplasm were examined electron-microscopically at different proximo-distal levels. The proportion of unmyelinated axon profiles was 50-55% at mid-root and distal levels as compared to 30% in normal adult cats. In the juxtamedullary root fascicles the proportion was normal (average 20%), and few unmyelinated axons seemed to penetrate into the CNS through the ventral root. The number of myelinated axons was within the normal range.
D000818:Animals; D001369:Axons / Q000648:ultrastructure; D002415:Cats; D005260:Female; D007414:Intestinal Neoplasms / Q000648:ultrastructure*; D008854:Microscopy, Electron; D009412:Nerve Fibers / Q000648:ultrastructure; D013126:Spinal Nerve Roots / Q000648:ultrastructure*