A 12-year-old 510-kg (1,122-lb) Thoroughbred mare was evaluated because of an 8-week history of sudden-onset nonprogressive hind limb ataxia. There had been minimal to no clinical improvement following multiple treatments (administration of ponazaril, toltrazuril, decoquinate, and levamisole) for equine protozoal myeloencephalitis (EPM). Heart and respiratory rates were within reference limits, and rectal temperature was slightly high (38.7°C [101.7°F]). The remainder of the physical examination findings were unremarkable.
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.
EPM Sarcocystis neurona SAG2/4/3 ELISA, Equine Diagnostic Solutions, Lexington, Ky.
1. Gold JR, Divers TJ, Miller AJ, et al. Cervical vertebral spinal hematomas in 4 horses. J Vet Intern Med 2008;22:481–485.
2. Cunha dos Santos FC, de Lourdes Adrien Delgado M, Fernades CG, et al. Cervical extradural hematoma in an ataxic horse. Equine Vet Educ 2014;26:306–309.
3. Adamson DC, Bulsara K, Bronec PR. Spontaneous cervical epidural hematoma: case report and literature review. Surg Neurol 2004;62:156–159.
4. Sai Kiran NA, Kasliwal MK, Kale SS, et al. Two children with traumatic thoracic spinal epidural hematoma. J Clin Neurosci 2009;16:1356–1358.
5. Rosenberg O, Itshayek E, Israel Zvi. Spontaneous spinal epidural hematoma in a 14-year-old girl. Pediatr Neurosurg 2003;38:216–218.
6. Hsieh CT, Chiang YH, Tang CT, et al. Delayed traumatic thoracic spinal epidural hematoma: a case report and literature review. Am J Emerg Med 2007;25:69–71.