A 3‐month‐old male, entire, English bull terrier was presented for investigation of a 24‐hour history of lethargy, pyrexia and neck pain. Inflammatory cerebrospinal and synovial fluid analyses with identification of Pasteurella multocida in the left stifle were supportive of a steroid‐responsive meningitis‐arteritis (SRMA) and immune‐mediated arthritis secondary to septic arthritis in the left stifle. The patient was successfully treated with amoxicillin/clavulanic acid and immunosuppressive doses of corticosteroids. Follow‐up sampling of cerebrospinal and synovial fluids revealed resolution of the septic arthritis and SRMA after 6 weeks of treatment. Medications were tapered and discontinued after 16 weeks of treatment without any signs of relapse. Follow‐up was 16 weeks. This is the first case report of SRMA with the identification of P. multocida septic arthritis as the suspected trigger.
A 2-year-old male entire Cane Corso was presented for investigations into a 1-week history of ambulatory paraparesis and pelvic limb ataxia gradually deteriorating. Magnetic resonance imaging (MRI) revealed intraventricular space-occupying lesions affecting the fourth ventricle and lateral apertures and intradural-extramedullary space-occupying lesions at the level of C7 vertebra, L4-L5, and L7-S1 intervertebral disk spaces. Due to poor quality of life, the patient was euthanized. A post-mortem examination revealed partially encapsulated, multifocally infiltrative, and moderately cellular neoplastic masses. The histological description was similar for all masses. The cells appeared cuboidal with round central nuclei and a moderate amount of eosinophilic cytoplasm and were arranged almost exclusively in single-layered papilliform patterns supported by a fibrovascular stroma. Mitoses were rarely observed (1/2.37 mm2). The primary neoplasm was morphologically most consistent with a choroid plexus papilloma despite drop metastases. This is the first report of a histologically confirmed primary ventricular choroid plexus papilloma causing disseminated MRI-apparent intraventricular and spinal drop metastases.
An 11-year-old, male, neutered raw fed greyhound was presented for a 2-week history of progressive non-lateralised, non-painful ambulatory paraparesis, deteriorating acutely to non-ambulatory tetraparesis. Magnetic resonance imaging, cerebrospinal fluid analysis and polymerase chain reaction tests confirmed the diagnosis of meningoencephalomyelitis secondary to Neospora caninum infection. Despite treatment, the patient deteriorated and was euthanased. Postmortem examination revealed diffuse areas of necrotising encephalomyelitis, multifocal non-suppurative encephalomyelitis and areas of necrotising non-suppurative cerebellitis. N. caninum parasitic cysts could also be identified. This is the first case report of correlated histological features and magnetic resonance imaging of meningoencephalomyelitis secondary to N. caninum. This case report was presented as an online poster presentation at the online 33rd ESVN-ECVN symposium.
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