Nephrotomography and ultrasonography for the localization of hyperfunctioning adrenocortical tumors in dogs

George Voorhout From the Department of Radiology (Voorhout), the Small Animal Clinic (Rijnberk and Sjollema), and the Department of Pathology (van den Ingh), Faculty of Veterinary Medicine, State University of Utrecht, Yalelaan 10, 3584 CM Utrecht, The Netherlands.

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Ad Rijnberk From the Department of Radiology (Voorhout), the Small Animal Clinic (Rijnberk and Sjollema), and the Department of Pathology (van den Ingh), Faculty of Veterinary Medicine, State University of Utrecht, Yalelaan 10, 3584 CM Utrecht, The Netherlands.

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Bart E. Sjollema From the Department of Radiology (Voorhout), the Small Animal Clinic (Rijnberk and Sjollema), and the Department of Pathology (van den Ingh), Faculty of Veterinary Medicine, State University of Utrecht, Yalelaan 10, 3584 CM Utrecht, The Netherlands.

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Ted S. G. A. M. van den Ingh From the Department of Radiology (Voorhout), the Small Animal Clinic (Rijnberk and Sjollema), and the Department of Pathology (van den Ingh), Faculty of Veterinary Medicine, State University of Utrecht, Yalelaan 10, 3584 CM Utrecht, The Netherlands.

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SUMMARY

Nephrotomography and ultrasonography were used in 11 dogs with hyperadrenocorticism to assess the value of these techniques for the localization of biochemically diagnosed hyperfunctioning adrenocortical tumors. Both techniques enabled accurate localization of a unilateral adrenal mass in each of the dogs. Cross-sectional diameters of the masses ranged from 1 to 4 cm. In 1 dog, expansion of tumor into the caudal vena cava was revealed by caudal venacavography and ultrasonography. Mineralization in the tumor mass in 2 dogs was easily recognized by nephrotomography, but not by ultrasonography.

Paracostal laparotomy confirmed the presence of an adrenocortical tumor in each dog, and expansion of tumor into the caudal vena cava in 1 dog. Cross-sectional diameters of the tumors ranged from 1.2 to 4.5 cm and corresponded well with cross-sectional measurements by nephrotomography and ultrasonography.

It was concluded that nephrotomography and ultrasonography have similar diagnostic accuracies for the detection and localization of hyperfunctioning adrenocortical tumors.

SUMMARY

Nephrotomography and ultrasonography were used in 11 dogs with hyperadrenocorticism to assess the value of these techniques for the localization of biochemically diagnosed hyperfunctioning adrenocortical tumors. Both techniques enabled accurate localization of a unilateral adrenal mass in each of the dogs. Cross-sectional diameters of the masses ranged from 1 to 4 cm. In 1 dog, expansion of tumor into the caudal vena cava was revealed by caudal venacavography and ultrasonography. Mineralization in the tumor mass in 2 dogs was easily recognized by nephrotomography, but not by ultrasonography.

Paracostal laparotomy confirmed the presence of an adrenocortical tumor in each dog, and expansion of tumor into the caudal vena cava in 1 dog. Cross-sectional diameters of the tumors ranged from 1.2 to 4.5 cm and corresponded well with cross-sectional measurements by nephrotomography and ultrasonography.

It was concluded that nephrotomography and ultrasonography have similar diagnostic accuracies for the detection and localization of hyperfunctioning adrenocortical tumors.

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