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Primary hyperaldosteronism in a dog with concurrent lymphoma.
K D Johnson1, C J Henry, D L McCaw
1Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, MO, USA. johnkim@missouri.edu
Summary
A dog with lymphoma developed persistent low potassium (hypokalemia) due to primary hyperaldosteronism, a rare canine endocrine disorder. Immunohistochemistry confirmed an aldosterone-secreting tumor, aiding diagnosis.
Area of Science:
- Veterinary Medicine
- Endocrinology
- Canine Oncology
Background:
- Lymphoma is a common cancer in dogs, often requiring complex treatment protocols.
- Endocrine disorders can present with non-specific clinical signs, complicating diagnosis.
- Persistent hypokalemia is a significant electrolyte imbalance that warrants thorough investigation.
Observation:
- An 11-year-old English Springer Spaniel presented with muscle weakness, lethargy, and anorexia during lymphoma treatment.
- The dog exhibited persistent hypokalemia, refractory to initial management.
- Diagnostic workup included serum aldosterone level measurement and surgical exploration.
Findings:
- Primary hyperaldosteronism was diagnosed, characterized by excessive aldosterone secretion.
- Histopathology and immunohistochemistry confirmed an aldosterone-secreting adrenal tumor.
- This case highlights a rare endocrinopathy in a canine patient with concurrent lymphoma.
Implications:
- Primary hyperaldosteronism is a rare but significant differential diagnosis in dogs with hypokalemia.
- Immunohistochemistry is a valuable tool for diagnosing adrenal tumors.
- Understanding rare endocrinopathies is crucial for comprehensive veterinary care, especially in complex cases like cancer treatment.
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