November 9, 2015

Normal Variation in Lateral Ventrical of Labrador Retriever

Assesed by Magnetic Resonance Imaging

Researchers at Washington State University noticed that abnormalities between the left and right ventricles of a dog’s brain can make some conditions hard to diagnose. The problem being what is normal and what is not. In this study those researchers are further looking at how common those abnormalities are, as well as how harmful. Researchers obtained 62 young, adult male Labrador Retrievers. Before the dogs could be tested they were put through a blood test and a cerebrospinal fluid test to ensure that there was nothing that could interfere with the results of this experiment. The researchers then scanned each dog’s head using MRI. Once the images came out each image was subjectively graded as normal or enlarged in size and yes or no for asymmetry. If there was asymmetry, then it was rated as mild, moderate or severe.

Of the 62 dogs, 38 had normal, symmetric ventricles. Five had enlarged but still symmetric ventricles. Two of the five had no visible midline structures but were otherwise normal. This was attributed to the clarity of the imaging and not to any abnormalities in the dogs. Of the remaining 19 dogs, 16 had normal ventricles with mild asymmetry and 3 had moderate or severe asymmetry. In the three dogs with moderate or severe asymmetry, the smaller ventricle was considered normal size, the larger one was deemed enlarged. There was no significant pattern to the side of the asymmetry and none of the dogs were in any way harmed by their condition.

Haan, Constance E., Susan L. Kraft, Patrick R. Gavin, Lyle R. Wendling, and Merle L. Griebenow. "Normal Variation In Size Of The Lateral Ventricles Of The Labrador Retriever Dog As Assessed By Magnetic Resonance Imaging." Veterinary Radiology & Ultrasound 35: 83-86. Web. 3 Nov. 2015.

http://onlinelibrary.wiley.com/doi/10.1111/j.1740-8261.1994.tb00191.x/abstract