Abstract
An 8-year-old Labrador Retriever developed acute central vestibular signs. An extra-axial mass was detected on MR images ventral to the brainstem. The mass was both T1- and T2-hypointense; there was also thin-rimmed patchy contrast enhancement. These findings were nonspecific, but the extreme T2-hypointensity was notable and suggested a hemorrhagic mass. The histologic diagnosis was anaplastic meningioma with acute hemorrhage. These findings document an unusual appearance of a meningioma in MR images due to intratumoral hemorrhage.
MeSH terms
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Animals
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Autopsy / veterinary
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Brain Stem / pathology
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Dog Diseases / diagnosis*
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Dog Diseases / etiology
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Dog Diseases / pathology
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Dogs
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Euthanasia, Animal
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Intracranial Hemorrhages / complications
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Intracranial Hemorrhages / pathology
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Intracranial Hemorrhages / veterinary*
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Magnetic Resonance Imaging / methods
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Magnetic Resonance Imaging / veterinary
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Meningeal Neoplasms / complications
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Meningeal Neoplasms / diagnosis
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Meningeal Neoplasms / pathology
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Meningeal Neoplasms / veterinary*
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Meningioma / complications
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Meningioma / diagnosis
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Meningioma / pathology
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Meningioma / veterinary*