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Year 2017 - Volume 37, Number 10
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Feline injection site sarcoma: computed-tomographic density and assessment of tumor dimensions by different methods, 37(10):1113-1118
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ABSTRACT.- Zardo K.M., Damiani L.P., Matera J.M. & Fonseca-Pinto A.C.B.C. 2017. Feline injection site sarcoma: computed-tomographic density and assessment of tumor dimensions by different methods. Pesquisa Veterinária Brasileira 37(10):1113-1118. Departamento de Cirurgia, Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, Cidade Universitária, Avenida Prof. Orlando Marques de Paiva 87, São Paulo, SP 05508-270, Brazil. E-mail: kmzardo@gmail.com
Feline injection site sarcoma is a malignant neoplasm with digitiform projections into muscular planes that are ill recognized during physical examination and may compromise tumor margin demarcation. This study compared tumoral size of 32 cats measured by different methods, and evaluated the CT density of 10 tumoral tissues (Hounsfield unit) based on histograms. Tumor axes were measured by physical examination and CT images. Larger craniocaudal axis measurements were obtained following multiplanar reconstruction of pre- and post-contrast CT images (p=0.049 and p=0.041 respectively); dorsoventral axis measurements taken from post-contrast CT images were also larger (p=0.010). Tumor volume estimates increased following contrast-enhancement. Histograms tended to produce two peaks: one in the fat and another in the soft tissue attenuation range. Multiplanar reconstructed post-contrast CT images provided clearer definition of tumor margins and more judicious determination of tumor size. A tendency of common FISS attenuation profile could be described. |
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