Gastric dilatation-volvulus in a guinea pig (Cavia porcellus).

A 3-year-old, intact female guinea pig (Cavia porcellus) was presented for anorexia and abdominal distention of 24 hours' duration. Radiographs revealed a severely distended stomach, suggestive of severe gastric dilatation or gastric dilatation-volvulus (GDV). Exploratory surgery was recommended, but the owners elected euthanasia.

Quantitative assessment of blood volume and permeability in cerebral mass lesions using dynamic contrast-enhanced computed tomography in the dog.

Rationale And Objectives: To evaluate cerebral blood volume (CBV) and permeability (PS) in spontaneously occurring cerebral neoplastic and non-neoplastic lesions in dogs using dynamic contrast-enhanced computed tomography (DCE-CT).

Materials And Methods: Dogs presenting with spontaneous intracranial lesions (n = 16) underwent DCE-CT at the level of the lesion followed by a histologically confirmed diagnosis from a CT-guided stereotactic biopsy. Data post-processing was performed with commercially available CT software (GEMS Advantage Workstation 4.

Quantitative assessment of blood volume, blood flow, and permeability of the brain of clinically normal dogs by use of dynamic contrast-enhanced computed tomography.

Objective: To determine effects of regional variation, interobserver variability, and vessel selection on quantitative vascular variables derived by dynamic contrast-enhanced computed tomography (DCE-CT) of the brain of clinically normal dogs.

Animals: 14 adult dogs with no evidence of CNS dysfunction.

Procedures: Dogs were randomly assigned to 4 groups, and DCE-CT was performed at the level of the frontal lobe, rostral portion of the parietal-temporal lobes, caudal portions of the parietal-temporal lobes, or occipital lobe-cerebellum for groups 1 to 4, respectively.