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  • Title: Results of surgical treatment for hyperadrenocorticism caused by adrenocortical neoplasia in the dog: 25 cases (1980-1984).
    Author: Scavelli TD, Peterson ME, Matthiesen DT.
    Journal: J Am Vet Med Assoc; 1986 Nov 15; 189(10):1360-4. PubMed ID: 3793588.
    Abstract:
    Results of surgical treatment for neoplasia of the adrenal cortex that caused hyperadrenocorticism were evaluated in 25 dogs. Surgical examination of the adrenal glands was performed by use of a ventral midline approach in 24 dogs and a retroperitoneal approach in 1 dog. All 25 dogs had a unilateral, adrenocortical tumor. Histologic examination identified 14 adrenocortical carcinomas and 11 adenomas. Seven dogs with carcinoma had visible metastasis to the liver, 3 had local invasion into the caudal vena cava, and 1 had extension into the adjacent renal vein. Seven of the 9 dogs with metastasis were euthanatized at time of surgery. Of the remaining 18 dogs that survived surgery, 9 (4 with carcinoma and 5 with adenoma) developed serious postoperative complications including acute renal failure, pneumonia, and pulmonary artery thromboembolism; 8 of these dogs died or were euthanatized. Of the remaining 10 dogs, clinical signs associated with hyperadrenocorticism resolved in the 7 dogs that had adrenocortical adenoma and in 1 of the 3 dogs that had carcinoma. The remaining 2 dogs with carcinoma had persistent hyperadrenocorticism and were treated with high doses of mitotane. Although no response was observed in 1 dog with visible hepatic metastasis, a decrease in serum cortisol concentrations and resolution of clinical signs were detected in the other dog during prolonged daily administration of mitotane.
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