Canine hypoadrenocorticism: pathogenesis, diagnosis, and treatment

Area of Science:

• Veterinary Medicine
• Endocrinology

Background:

• Hypoadrenocorticism (Addison's disease) is a rare endocrine disorder in dogs and cats.
• It results from immune-mediated destruction of adrenal glands, leading to deficient cortisol and aldosterone production.
• Clinical signs are varied, including gastrointestinal issues, weakness, and weight loss, often mimicking other diseases.

Purpose of the Study:

• To summarize the key aspects of hypoadrenocorticism in veterinary medicine.
• To highlight diagnostic challenges and definitive testing methods.
• To underscore the importance of appropriate treatment for a positive prognosis.

Main Methods:

• Review of clinical presentation and common laboratory findings in hypoadrenocorticism.
• Emphasis on the definitive diagnostic role of adrenocorticotropic hormone (ACTH) stimulation testing.
• Discussion of additional tests like ACTH levels and aldosterone measurements when necessary.

Main Results:

• Hypoadrenocorticism presents with diverse clinical signs and variable electrolyte patterns, sometimes with normal serum electrolytes.
• Classic laboratory abnormalities may include hyperkalemia, hyponatremia, azotemia, and anemia.
• ACTH stimulation testing is crucial for diagnosis, confirming inadequate cortisol response.

Conclusions:

• Accurate diagnosis of hypoadrenocorticism relies on specific endocrine testing, particularly ACTH stimulation.
• Despite varied presentations, prompt diagnosis and treatment lead to a good prognosis.
• Hormone supplementation is essential for managing mineralocorticoid and glucocorticoid deficiencies.