Cushing's Disease in Cattle

Though it is commonly considered a canine condition, Cushing's disease or hyperadrenocorticism has also been observed in cattle, sheep and horses. In cattle, the condition is caused by tumors on the pituitary glands. These adrenal tumors fall into two categories, adenomas and carcinomas.

  1. Adenoma

    • Adenoma is occasionally observed in cows and steers. This benign tumor can form on one or both adrenal glands.

    Carcinomas

    • Carcinomas or cancerous tumors of the adrenal glands occur more often in older cattle of either sex. These tumors are typically larger than adenomas, and generally occur on both sides, according to the Merck Veterinary Manuel.

    Diagnosis

    • The first step to diagnosis is usually a blood test. Ultrasound of the affected glands may also be conducted.

    Symptoms

    • Cushing's disease commonly results in excessive thirst or hunger, and thus excessive urination, in the affected animal. Animals may also appear lethargic.

    Complication

    • The most common complication of Cushing's disease is the development of diabetes. Veterinarians may suggest dietary control of the animal's blood sugar levels.