Peer-reviewed veterinary case report
MRI fat variation in dog petrous temporal bone can mimic lesions
By Cooper, Jocelyn J et al.·Published in Veterinary radiology & ultrasound : the official journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association·2010·Department of Small Animal Clinical Sciences, United States·View original on PubMed →
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Original publication title: Imaging diagnosis--magnetic resonance imaging pseudolesion associated with the petrous temporal bone.
- Species:
- dog
Plain-English summary
A dog was brought in for imaging due to seizure activity, and during the MRI, unusual bright spots were seen in the brain. These spots were later determined to be normal fat deposits in the petrous temporal bone, not a sign of disease. By using special imaging techniques, veterinarians can tell the difference between actual problems and these harmless variations. This means that not all bright spots on an MRI indicate a serious issue, which can help pet owners feel more at ease if similar findings occur in their pets.
People also search for: dog seizure MRI results · what does a dog MRI show · dog brain imaging bright spots
Abstract
Normal anatomic variation in the amount of fat within the petrous temporal bone of dogs can result in a magnetic resonance (MR) imaging pseudolesion. Focal hyperintense areas in the region of the hippocampus on T1-weighted, T1-weighted, and fluid-attenuated inversion recovery imaging sequences were noted in a dog being imaged for seizure activity. Further investigation of this region, aided by the use of cadaveric specimens, led to the identification of normal anatomic variability in the amount of fat in the substantia spongiosa of the petrous temporal bone. The presence of normal adipose tissue was confirmed histopathologically. Fat suppression MR imaging sequences can be used to differentiate whether hyperintensity ventral to the hippocampus is a result of a pathologic process, or fat in the substantia spongiosa of the petrous temporal bone.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/20166391/