Intracranial epidermoid cyst and syringohydromyelia in a dog.
A 5-year-old female Cocker Spaniel dog had a sudden onset of vestibular disease that localized to the caudal fossa. Upon computed tomography of the brain, a large, hypoattenuating mass with a slight peripheral ring enhancement pattern was detected ventral to the cerebellum. A hypoattenuating region was also identified in the center of the C2 spinal cord segment, consistent with syringohydromyelia. Postmortem examination of the brain revealed a fluid filled, cystic mass located dorsal to medulla oblongata that caused severe compression of the overlying cerebellum. The histopathologic diagnosis was an epidermoid cyst. Extensive syringohydromyelia and obstructive hydrocephalus were identified, both thought to be secondary to overcrowding of the caudal fossa.
MacKillop
Edward
E
North Carolina State University College of Veterinary Medicine, 4700 Hillsborough Street, Raleigh, NC 27606-1428, USA. edward_mackillop@ncsu.edu
Schatzberg
Scott J
SJ
De Lahunta
Alexander
A
D000818:Animals; D020295:Brain Stem Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000662:veterinary*; D003388:Cranial Fossa, Posterior / Q000000981:diagnostic imaging; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D004814:Epidermal Cyst / Q000150:complications / Q000000981:diagnostic imaging / Q000662:veterinary*; D005260:Female; D013595:Syringomyelia / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary*; D014057:Tomography, X-Ray Computed / Q000662:veterinary