A 1.5-year-old 9-kg (20-lb) spayed female Pug was evaluated because of a 6-month history of progressive tetraparesis. During physical examination, the dog was alert and had responsive mentation. Ambulatory tetraparesis with hypermetria of the thoracic limbs was evident. Conscious proprioception of the thoracic and pelvic limbs was absent; there were skin abrasions on the dorsal surface of the feet of the thoracic limbs. No signs of pain were elicited on palpation of the cervical portion of the vertebral column. Thoracic and cardiac auscultation, abdominal palpation, lymph node palpation, and orthopedic examination revealed no abnormalities.
What is the problem? Where is the lesion? What are the most probable causes of this problem? What is your plan to establish a diagnosis? Please turn the page.
Cambridge AJ, Bagley RS, Britt LG, et al. Radiographic diagnosis: arachnoid cyst in a dog. Vet Radiol Ultrasound 1997;38:434–436.
Galloway AM, Curtis NC, Sommerlad SF, et al. Correlative imaging findings in seven dogs and one cat with spinal arachnoid cysts. Vet Radiol Ultrasound 1999;40:445–452.
Rylander H, Lipsitz D, Berry WL, et al. Retrospective analysis of spinal arachnoid cysts in 14 dogs. J Vet Intern Med 2002;16:690–696.