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Cerebral cryptococcal granuloma in a cat.

S F Foster1, J A Charles, G Parker

  • 1Department of Veterinary Clinical Sciences, The University of Sydney, NSW, Australia.

Journal of Feline Medicine and Surgery
|November 22, 2001
PubMed
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A cat with seizures initially diagnosed with toxoplasmosis was later found to have cryptococcosis. This case highlights the importance of testing for cryptococcal antigen in cats with neurological signs.

Area of Science:

  • Veterinary Neurology
  • Mycology
  • Diagnostic Imaging

Background:

  • Neurological signs in cats can be challenging to diagnose.
  • Toxoplasmosis is a common differential diagnosis for intracranial disease in felines.
  • Cryptococcosis is an emerging fungal pathogen affecting the central nervous system in cats.

Observation:

  • A 7-year-old cat presented with seizures, initially treated for toxoplasmosis.
  • Despite treatment, neurological signs progressed, and MRI revealed a cerebral mass.
  • Histopathology confirmed a cryptococcal granuloma, with retrospective serology positive for cryptococcosis.

Findings:

  • This is the first report detailing the MRI appearance of a cerebral cryptococcoma in a feline.
  • Magnetic resonance imaging (MRI) findings of a contrast-enhancing lesion were suggestive of a tumor.

Related Experiment Videos

  • Cryptococcal granulomas can mimic neoplastic lesions on MRI.

    • Implications:

    • Cryptococcal antigen testing should be considered in cats with intracranial disease.
    • Accurate diagnosis of fungal granulomas is crucial for appropriate treatment and prognosis.
    • This case expands the understanding of feline central nervous system fungal infections and their imaging characteristics.