Imaging diagnosis--Hemorrhagic meningioma.
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.
Martin-Vaquero
Paula
P
Department of Veterinary Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA. martin-vaquero.1@osu.edu
Da Costa
Ronaldo C
RC
Aeffner
Famke
F
Oglesbee
Michael J
MJ
Echandi
Rita L
RL
D000818:Animals; D001344:Autopsy / Q000662:veterinary; D001933:Brain Stem / Q000473:pathology; D004283:Dog Diseases / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology; D004285:Dogs; D037901:Euthanasia, Animal; D020300:Intracranial Hemorrhages / Q000150:complications / Q000473:pathology / Q000662:veterinary*; D008279:Magnetic Resonance Imaging / Q000379:methods / Q000662:veterinary; D008577:Meningeal Neoplasms / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*; D008579:Meningioma / Q000150:complications / Q000175:diagnosis / Q000473:pathology / Q000662:veterinary*