Contrast-enhanced ultrasound features of hepatocellular carcinoma in dogs

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Abstract

Background: This study aimed to describe the contrast-enhanced ultrasound (CEUS) features of canine hepatocellular carcinoma (HCC) in relation to cellular differentiation and lesion size. Methods: Sixty dogs with a cytological diagnosis of HCC and that underwent a CEUS examination were retrospectively selected. The wash-in and wash-out patterns of contrast enhancement, along with the time to wash-in and the time to wash-out, of each lesion were recorded. A dimensional cut-off value of 3 cm was adopted for classification. Results: Cellular differentiation had a significant influence on both wash-in (chi-squared= 16.99; P<0.001) and wash-out (chi-squared= 10.9; P=0.004) patterns of contrast enhancement. Lesion size had a lower, but still significant, influence on both wash-in (chi-squared= 12.7; P=0.005) and wash-out (chi-squared= 7.42; P=0.024) patterns. A homogeneous hyperenhancement in the arterial phase followed by homogeneous wash-out were suggestive of a well-differentiated HCC. The cellular differentiation of lesions with inhomogeneous hyperenhancement or hypoenhancement/no enhancement as well as an inhomogeneous wash-out or no wash-out could not be inferred. Conclusions: No significant difference in the time to wash-in and the time to wash-out in relation to cellular differentiation or lesion size was evident. CEUS has the potential to improve efficiency in the diagnosis of HCCs in dogs.

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Banzato, T., Rubini, G., Orlandi, R., Bargellini, P., Bonsembiante, F., & Zotti, A. (2020). Contrast-enhanced ultrasound features of hepatocellular carcinoma in dogs. Veterinary Record, 186(6). https://doi.org/10.1136/vr.105282

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