title: Identification of arachnoid cysts in the quadrigeminal cistern using ultrasonography.
abstract: The ultrasonographic findings in three small breed dogs with intracranial arachnoid cysts are described. Ultrasound images were obtained via the foramen magnum, temporal window and persistent bregmatic fontanelle (when possible). In transverse, dorsal and sagittal transcranial ultrasound images there was marked dilation of the lateral ventricles and a well-defined, oval to triangular-shaped anechoic area between the caudal aspect of the occipital lobes, dorsal to the midbrain, and rostral to the cerebellum. These findings were consistent with a diagnosis of concurrent hydrocephalus and an arachnoid cyst within the quadrigeminal cistern.
authors.affiliation: Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh 27606, USA.
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: N J
authors.initials: NJ
authors.lastname: Olby
authors.forename: K
authors.initials: K
authors.lastname: Spaulding
mesh_terms: D000818:Animals; D016080:Arachnoid Cysts / Q000000981:diagnostic imaging / Q000662:veterinary*; D001947:Breeding; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D005260:Female; D008297:Male; D003336:Tectum Mesencephali / Q000000981:diagnostic imaging; D017585:Ultrasonography, Doppler, Transcranial / Q000662:veterinary