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Magnetic resonance imaging features of brain stem abscessation in two cats
L S Klopp1, J T Hathcock, D C Sorjonen
1Department of Veterinary Clinical Medicine, University of Illinois, Urbana 61802, USA.
Abstract:
Premortem magnetic resonance imaging (MRI) was performed in two cats with brain stem abscessation confirmed post mortem by histology and recovery of multiple bacterial species. The MRI features of the abscesses were distinctive and included a thick and marked enhancement of the abscess capsule and extension of the lesion from a tympanic bulla in one cat. A focal area of increased signal intensity was present on T2-weighted images. A circumscribed area of decreased signal intensity was surrounded by a ring of increased signal intensity on precontrast T1-weighted images. A center of decreased signal intensity with a thick, markedly enhanced abscess capsule was observed on post contrast T1-weighted images. These findings are compared to the current experimental and clinical literature of brain abscess. The underlying pathogenesis of MRI features is reviewed.
Insights
Magnetic resonance imaging (MRI) revealed distinctive features of brain stem abscesses in two cats. These findings aid in diagnosing feline brain abscesses using advanced imaging techniques.
Area of Science:
- Veterinary Neurology
- Diagnostic Imaging
- Comparative Pathology
Background:
- Brain stem abscesses are a severe condition in felines.
- Accurate diagnosis is crucial for appropriate treatment and prognosis.
- Magnetic resonance imaging (MRI) is a key diagnostic tool in veterinary neurology.
Observation:
- Two feline cases of brain stem abscessation were evaluated using premortem MRI.
- Abscesses exhibited characteristic MRI features, including thick, enhancing capsules and extension from the tympanic bulla.
- Specific signal intensities on T2-weighted and pre/post-contrast T1-weighted images were noted.
Findings:
- Distinctive MRI characteristics of brain stem abscesses were identified.
- Key findings included marked capsular enhancement and T2 hyperintensity.
- Pre-contrast T1 images showed central hypointensity with a T1 hyperintense rim, evolving to central hypointensity with marked capsular enhancement post-contrast.
Implications:
- The study highlights specific MRI findings indicative of brain stem abscesses in cats.
- These findings can improve diagnostic accuracy and guide treatment strategies.
- Understanding the MRI appearance aids in differentiating abscesses from other brain lesions.