Elber Alberto Soler Arias(1,*), Victor Alejandro Castillo(1) and Roberto Hector Trigo(2)
1 Hospital Escuela, Unidad de Endocrinología, Área de Clínica Médica de Pequeños Animales, Fac. de Ciencias Veterinarias, UBA, Av. Chorroarín 280, Ciudad Autónoma de Buenos Aires, Argentina
2 Cátedra de Patología, Fac. de Ciencias Veterinarias, UBA, Av. Chorroarín 280, Ciudad Autónoma de Buenos Aires, Argentina
A 12-year old dog with a 9-year history of primary adrenal insufficiency was referred to the service for hyporexia, muscle weakness, polyuria and polydipsia. Ultrasound examination showed an unresectable mass in the left adrenal gland, with local vascular invasion, which prompted the euthanasia of the animal. Additionally, necropsy revealed a nodular lesion in the right adrenal gland and enlargement of one of the four parathyroid glands. Parathyroid hormone levels were elevated, but ionized and total calcium levels were normal. Histopathology supported the diagnosis of parathyroid chief cell adenoma and bilateral pheochromocytoma. Immunohistochemical staining was positive for synaptophysin, and negative for Melan-A and calretinin, which confirmed the diagnosis of pheochromocytoma. This case highlights an unusual presentation of multiple endocrine neoplasias within the context of primary adrenal insufficiency and normocalcemic primary hyperparathyroidism.
Keywords: Hypoadrenocorticism, Parathyroid adenoma, Pheochromocytoma, Synaptophysin.
Cite this paper:
Soler Arias, E.A., Castillo, V.A. and Trigo, R.H. 2017. Addison
disease and normocalcemic primary hyperparathyroidism in a dog with multiple
endocrine neoplasia. Open Vet. J. 7(4), 332-336.