Imaging diagnosis--degenerative intraspinal cyst associated with an intervertebral disc.
A 6-year-old neutered male Rottweiler had chronic episodic signs of thoracolumbar pain and inability to stand that did not improve after rest and nonsteroidal antiinflammatory medication. In magnetic resonance images, an extradural mass was identified between the spinal cord and the T13/L1 intervertebral disc; the mass was compressing the cord in a dorsoventral direction. The lesion had a low signal intensity rim that enhanced slightly after gadolinium administration, and contents with similar signal intensity to cerebrospinal fluid. The lesion was removed surgically by severing its attachments to the annulus fibrosus. The histologic diagnosis was degenerative intraspinal cyst. The origin of such cysts, and their relationship to synovial and ganglion cysts is discussed.
Penning
Victoria A
VA
Department of Veterinary Clinical Sciences, Queen Mother Hospital for Animals, The Royal Veterinary College, University of London Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA, UK. vpenning@rvc.ac.uk
Benigni
Livia
L
Steeves
Elizabeth
E
Cappello
Rodolfo
R
D000818:Animals; D020863:Central Nervous System Cysts / Q000150:complications / Q000175:diagnosis / Q000662:veterinary*; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000134:cerebrospinal fluid / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004285:Dogs; D007405:Intervertebral Disc Displacement / Q000150:complications / Q000175:diagnosis / Q000662:veterinary*; D008159:Lumbar Vertebrae; D008279:Magnetic Resonance Imaging / Q000662:veterinary; D008297:Male; D013904:Thoracic Vertebrae