Nasopharyngeal sialocoele with underlying auditory tube neoplasia in a cat.

Case summary: An 8-year-old cat was presented with recent signs related to upper airway obstruction. CT revealed a hypoattenuating mass, with rim enhancement, in the nasopharynx. Paracentesis yielded a viscous fluid, consistent with saliva on cytology. The sialocoele was aspirated, and surgical excision of the ipsilateral mandibular and sublingual salivary glands was performed. The sialocoele recurred 3 months later, associated with a polypoid structure in the auditory tube region. This was surgically extirpated. Histology was consistent with a tubulopapillar adenocarcinoma. Relevance and novel information: To our knowledge, this is the first case report of a nasopharyngeal sialocoele with confirmed underlying neoplasia in a cat, and the first description of CT imaging features of a nasopharyngeal sialocoele in a cat.

Case Report: Diffuse Lumbar Hyperostosis Causing Vertebral Canal Stenosis in a Dog With Concurrent Multicentric T-Cell Lymphoma.

A 4-year-old female spayed Bullmastiff-cross presented with a 24-h history of progressive paraparesis. Neurological examination was consistent with L4-S3 myelopathy. On magnetic resonance imaging (MRI), all vertebrae showed homogenously increased short tau inversion recovery (STIR) signal with strong contrast enhancement. The vertebral canal was concentrically narrowed along the length of the L5 vertebra secondary to bony proliferation of the vertebral pedicles, dorsal lamina, and vertebral body. Cytological analysis of the peripheral lymph nodes and subsequent flow cytometry was consistent with T-cell lymphoma. The dog was euthanised due to poor prognosis. Necropsy confirmed the presence of stage V multicentric T-cell lymphoma, as well as diffuse hyperostosis of the vertebral bodies. This is the first report of presumed paraneoplastic lumbar skeletal hyperostosis.

Lung lobe torsion in 15 dogs: Peripheral band sign on ultrasound.

The diagnosis of lung lobe torsion in dogs is usually based on radiological, endoscopic, and CT features. Few ultrasonographic descriptions have been published. The purpose of this multicenter, retrospective, and prospective observational study was to investigate the presence of a hypoechoic area forming a pulmonary band or line at the periphery of the twisted lobe on ultrasonography and assess its significance by comparing it to CT and histological findings. Fifteen dogs with lung lobe torsion confirmed surgically or postmortem were included. All had received ultrasonography and CT examinations; 13 had additional histopathological examination performed. In 14 cases, thoracic ultrasonography revealed a peripheral hypoechoic band, overlying areas of scattered, hyperreflecting interfaces in the affected lobe. On CT, central emphysema was surrounded by a peripheral, soft tissue attenuation band, affecting the periphery in 14 cases. No band was observed in one case, in which the lobe was entirely consolidated. Histological examination yielded a comparable peripheral band, consisting of a thickened visceral pleura with or without hemorrhagic necrosis of the underlying pulmonary parenchyma. This peripheral band may be related to the specific fractal organization of airways and vessels, which plays an important role in lung perfusion and ventilation and makes the lung periphery more prone to ischemia. Our findings suggest that the presence of a peripheral hypoechoic band, associated with central emphysema in a noncollapsed lung lobe on ultrasonography, is suggestive of compromised blood supply and air flow, and lung lobe torsion should therefore be suspected.

Intermittent urethral obstruction secondary to caudal sliding of a pelvic bladder in 3 dogs.

Three Yorkshire terrier dogs (2 males and 1 female) were presented for investigation of chronic dysuria and stranguria. Physical examination was unremarkable except for a poorly filled bladder. Biological tests, urinalysis, ultrasound, and routine radiography detected no significant abnormality, except for intermittent displacement of the bladder in the pelvis. Manual voiding cysto-urethrography showed marked caudal displacement of the bladder without perineal hernia and revealed intermittent, dynamic urethral obstruction. Obstructive kinking of the membranous urethra was observed in male dogs, and the marked caudal displacement of the bladder in the female dog was suspected to induce similar urethral obstruction, although this was not clearly visualized because of the absence of contrast filling of the obstructed urethra. All dogs showed resolution of the clinical signs following cystopexy. Key clinical message: This report documents the diagnostic value of manual voiding cysto-urethrography for the investigation of dynamic voiding disorders, especially in dogs with a pelvic bladder.

Obstruction urétrale intermittente secondaire au glissement caudal d'une vessie pelvienne chez trois chiens. Trois chiens de race Yorkshire (2 mâles et 1 femelle) furent présentés pour un problème de dysurie chronique et de strangurie. L'examen physique ne révéla rien d'anormal sauf une vessie pauvrement remplie. Des tests biologiques, une analyse d'urine, une échographie et des radiographies de routine ne détectèrent aucune anormalité, sauf pour le déplacement intermittent de la vessie dans le pelvis. Une cysto-urétrographie avec vidange manuelle a montré un déplacement caudal marqué de la vessie sans hernie périnéale et a révélé une obstruction urétrale dynamique et intermittente. Une plicature obstructive de l'urètre membraneuse fut observée chez les chiens mâles, et le déplacement caudal marqué de la vessie chez la chienne fut soupçonné d'induire une obstruction urétrale similaire, bien que ceci n'était pas clairement visualisé étant donné l'absence de remplissage par le milieu de contraste de l'urètre obstruée. La résolution des signes cliniques fut observée chez tous les chiens suite à la cystopexie.Message clinique important :Ce rapport documente la valeur diagnostique d'une cysto-urétrographie avec vidange manuelle pour l'étude de désordres de vidange dynamiques, spécialement chez les chiens avec une vessie pelvienne.(Traduit par Dr Serge Messier).

Computed tomographic characteristics of pneumolabyrinth in a French bulldog with otitis media and externa.

A four-year-old female French bulldog was presented for evaluation of acute, left-sided peripheral vestibular syndrome. Computed tomographic (CT) examination of the head revealed the presence of air within the left cochlea and vestibule, consistent with pneumolabyrinth. This was concurrent with ipsilateral otitis media and externa. Pneumolabyrinth is an uncommon finding in humans and is most frequently due to head trauma and temporal bone fracture. This is the first report describing pneumolabyrinth in a dog, apparently of nontraumatic origin in this case.

Computed tomographic findings in 205 dogs with clinical signs compatible with middle ear disease: a retrospective study.

BACKGROUND: Computed tomography (CT) is considered to be the reference method to evaluate middle ear structures. OBJECTIVES: To evaluate the presence and severity of CT changes in the middle ear and establish if any specific clinical presentations are associated with otitis media. ANIMALS: Medical records of animals referred for CT with history and clinical signs consistent with middle ear disease. METHODS: Retrospective evaluation of CT examinations of tympanic bullae performed over a six year period. Medical records were reviewed for signalment, clinical signs and cytological evaluation of the external ear canal. Dogs were divided into three clinical groups: chronic otitis externa (Group 1), peripheral vestibular disorder (Group 2) and other clinical presentations (Group 3). RESULTS: Group 1 - Of 214 ears, 87 (40.7%) had CT abnormalities: 38 of 87 (17.7%) had material-filled bullae, 42 of 87 (19.6%) had thickened bullae walls and seven of 87 (3.2%) had lysis of the bulla. Abnormalities were significantly more frequent in dogs with suppurative otitis than in erythemato-ceruminous otitis (57% and 23%, respectively; P = 0.003). Proliferative otitis, particularly in French bulldogs, was associated with severe otitis media. Group 2 - Of the 106 ears, 91 (85.8%) had normal tympanic bullae. Group 3 - Of the 26 ears from deaf dogs, 17 had filled bullae; all nine affected dogs were Cavalier King Charles spaniels. All dogs with Claude Bernard Horner syndrome or head tilt had normal tympanic bullae. CLINICAL SIGNIFICANCE: CT is useful for canine chronic otitis externa, particularly in suppurative or proliferative otitis, even in the absence of associated neurological signs.