RESUMO
This article describes the MRI features of a middle ear cholesteatoma in an 8 yr old flat-coated retriever. Physical examination revealed pain on opening the jaw, and otoscopic examination showed tympanic membrane rupture associated with hyperplastic tissue at the entrance of the middle ear. Standard MRI sequences allowed for the identification of a severely expanded bulla containing material that was isointense to brain tissue on T1-weighted images and of mixed intensity on T2-weighted and fluid-attenuated inversion recovery sequences. No postcontrast enhancement of the content was present, but the lining of the bulla was partially enhanced. The images allowed evaluation of the surgical margins and the secondary changes due to the expansion of the mass. Surgery was performed and histopathology confirmed the presumptive diagnosis of cholesteatoma. In the present case, MRI appeared to serve as a good alternative to computed tomography for the diagnosis of cholesteatoma.
Assuntos
Colesteatoma da Orelha Média/veterinária , Doenças do Cão/diagnóstico , Otite Externa/veterinária , Otite Média/veterinária , Técnicas de Ablação/veterinária , Animais , Colesteatoma da Orelha Média/diagnóstico , Colesteatoma da Orelha Média/cirurgia , Diagnóstico Diferencial , Doenças do Cão/cirurgia , Cães , Imageamento por Ressonância Magnética/veterinária , Masculino , Osteotomia/veterinária , Otite Externa/diagnóstico , Otite Externa/cirurgia , Otite Média/diagnóstico , Otite Média/cirurgia , Radiografia/veterinária , Resultado do TratamentoRESUMO
Polycystic kidney disease (PKD) is the most prevalent inherited genetic disease in cats with Persian and Persian-related breeds predominantly affected. Diagnosis of PKD relied on ultrasound scanning until the recent development of the PKD gene test. However, gene testing has limitations as it will only identify the autosomal dominant form of PKD and not other forms of cystic kidney disease. Ultrasound scanning also has the advantage of being able to assess the severity and progression of disease in PKD affected cats. The aim of this study was to demonstrate the repeatability of ultrasound scanning in the detection of PKD and to assess progression of the disease over time. This study demonstrated 100% repeatability of ultrasound scanning in the detection of PKD and has also demonstrated progression of disease in 75% of PKD positive cats assessed over a 1-year period.
Assuntos
Doenças do Gato/diagnóstico por imagem , Rim/anormalidades , Doenças Renais Policísticas/diagnóstico por imagem , Doenças Renais Policísticas/veterinária , Bexiga Urinária/anormalidades , Animais , Doenças do Gato/diagnóstico , Gatos , Progressão da Doença , Estudos de Viabilidade , Feminino , Rim/diagnóstico por imagem , Masculino , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Ultrassonografia/veterinária , Bexiga Urinária/diagnóstico por imagem , Medicina VeterináriaRESUMO
Mineralization of paraprostatic cysts is reported to be uncommon. This retrospective study was performed to review the imaging findings of eight histologically confirmed canine paraprostatic cysts. Radiographic patterns of mineralization seen are described. Four of the eight dogs had mineralized cysts. Mineralization seen on radiography was not consistently seen on ultrasonography, probably due to the lack of acoustic shadowing artefact from the small depth of mineralized tissue. It is thus concluded that mineralization of paraprostatic cysts is more common than implied in the literature, and that radiography is superior to ultrasonography in identifying its presence.