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ABSTRACT In Veterinary Medicine, diseases restricted to the gallbladder (GB) are uncommon in dogs. The histopathological examination of GB is considered the gold standard. However, abdominal ultrasound examination is increasingly included in the veterinary clinical routine, as it allows changes in previously underdiagnosed GB to have a more accurate diagnosis. The aim of this study was to identify, quantify and correlate the different aspects of GB in dogs through ultrasound and histopathological examinations. The GB of 60 dog cadavers were evaluated, without predilection for sex, age, and breed. The results demonstrated that the ultrasound examination, when compared to the histopathological examination, presented 83% agreement in the analysis of general data for the presence or absence of GB changes. The level of agreement in the Kappa test was considerably high (K=0.63). There was a high agreement in the diagnosis of changes observed by ultrasound and histopathological examinations, when compared “affected” or “non affected”. However, when compared the findings of mucocele, cystic mucinous hyperplasia and cholecystitis, there is a low Kappa agreement. Thus, ultrasound examination is an excellent tool for identifying changes related to the GB. However, more studies must be carried out to deepen the understanding of the correlation between imaging and pathological findings to lead diagnostic conclusions.

ABSTRACT This retrospective case series study describes the clinical and vascular ultrasound findings of 26 dogs diagnosed with abdominal thrombosis. Images were selected based on the detection of intravascular echogenic thrombus or the absence of vascular flow on color Doppler, confirmed by surgery or necropsy. Images were acquired using the Mylab 40 model, with linear and microconvex multifrequency probes. All the reports were evaluated along with the corresponding images by a veterinary diagnostic imaging radiologist. The ultrasonographic aspects evaluated were echogenicity (92.3%), anechogenicity (7.7%), vascularization (11.5%), mineralization (15.4%), and recanalization (7.7%) of the thrombosis. The vascular and hemodynamic findings were dilation of the affected vein (57.7%), total occlusion of blood flow (30.8%), presence of turbulent flow (65.38%), and visualization of smoke signal (blood flow detected as moving echogenic points in dynamic bidimensional mode) (11.5%). Neoplasms (19 cases) and nephropathies (13 cases) were the most common clinical conditions in the affected dogs. Eleven cases of vascular invasion due to adrenal neoplasms were identified. The results indicate that the vascular ultrasound examination is an important method for diagnosis, as 23 of the 26 cases did not show any clinical signs of thrombosis.