Incidence and type of brain herniation associated with intracranial
meningioma in dogs and cats |
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Authors: | Simone MINATO Giunio B. CHERUBINI Daniele DELLA SANTA Stefano SALVADORI Massimo BARONI |
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Affiliation: | 1)Valdinievole Veterinary Clinic, Via C. Nigra 123, 51015, Monsummano Terme, PT, Italy;2)Dick White Referrals, Station Farm, London Road, Six Mile Bottom, Cambridgeshire CB8 0UH, UK;3)Vet Hospital Firenze, Via Dei Vanni 25, 50142, Firenze, FI, Italy;4)Institute of Clinical Physiology, National Research Council, Via G. Moruzzi 1, 56124, Pisa, PI, Italy |
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Abstract: | The incidence of brain herniation (BH) in association with intracranial meningioma (ICM) in dogs and cats is poorly described. The aim of this study was to evaluate the rate and type of brain herniations in client-owned dogs and cats with ICMs and to determine the meningioma volume (MV) relative to cranial cavity volume (CCV). A retrospective magnetic resonance imaging (MRI) analysis study of 24 cats and 45 dogs with ICMs was conducted to ascertain the presence and characteristics of BH. MV and CCV were measured and their ratio was calculated for each animal. Correlations of MV/CCV with independent variables were analyzed. BH was encountered in 24/24 cats (100%) and 30/45 dogs (66.7%) with ICMs. In cats, the most frequent presentation was foramenal herniation (FMH; 23/24, 95.8%), followed by caudotentorial (CTH; 21/24, 87.5%) and subfalcine (SH; 18/24, 75.0%) herniation. In dogs, the most frequent presentation was SH (28/45; 62.2%), followed by CTH (9/45; 20%) and FMH (2/45; 4.4%). Relative to dogs, cats with ICM had greater incidences of FMH (P<0.001) and CTH (P<0.001). Mean MV/CCV ratio was higher in cats (0.098) than in dogs (0.038; P<0.001). The most common clinical sign of ICM was altered behavior in cats (43%, P<0.01) and seizures in dogs (74.4%, P<0.001). In conclusion, cats were found to be more likely than dogs to present FMH and CTH, with a proportionally greater neoplasia volume. |
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Keywords: | caudotentorial herniation foramenal herniation meningioma MRI subfalcine herniation |
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