IMAGING DIAGNOSIS--MAGNETIC RESONANCE IMAGING PSEUDOLESION ASSOCIATED WITH THE PETROUS TEMPORAL BONE

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, T2-weighted, and fluid-attenuated inversion recovery imaging sequences were...

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Bibliographic Details
Published in:Veterinary radiology & ultrasound 2010, Vol.51 (1), p.39-41
Main Authors: COOPER, JOCELYN J, LEVINE, JONATHAN M, YOUNG, BENJAMIN D, HICKS, DANIEL G, HOFFMAN, ANTON, BRATTON, GERALD
Format: Article
Language:English
Subjects:
adipose tissue
Adipose Tissue - diagnostic imaging
Animals
bones
Cadaver
case studies
Dog Diseases - diagnosis
Dogs
Female
hippocampus
histopathology
magnetic resonance imaging
Magnetic Resonance Imaging - veterinary
Male
MR imaging artifact
petrous apex
Petrous Bone - diagnostic imaging
petrous temporal bone
pseudolesion
Radiography
seizures
Seizures - diagnosis
Seizures - veterinary
symmetric hyperintensity T1WI
Temporal Bone
Texas
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Summary: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, T2-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.
ISSN:1058-8183
1740-8261
DOI:10.1111/j.1740-8261.2009.01618.x