Coexistence of corticotroph adenoma and thyrotroph hyperplasia in a dog

Pituitary thyrotroph hyperplasia results from prolonged primary hypothyroidism in humans, mice and rats. In dogs with Cushing's disease, many cases have low serum thyroid hormones concentrations due to euthyroid sick syndrome. A 6-year-old castrated male Beagle diagnosed with Cushing's dis...

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Veröffentlicht in:Journal of Veterinary Medical Science 2009, Vol.71(1), pp.93-98
Hauptverfasser: Teshima, T.(Nippon Veterinary and Life Science Univ., Musashino, Tokyo (Japan). Faculty of Veterinary Medicine), Hara, Y, Shigihara, K, Takekoshi, S, Nezu, Y, Harada, Y, Yogo, T, Teramoto, A, Osamura, R.Y, Tagawa, M
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container_title Journal of Veterinary Medical Science
container_volume 71
creator Teshima, T.(Nippon Veterinary and Life Science Univ., Musashino, Tokyo (Japan). Faculty of Veterinary Medicine)
Hara, Y
Shigihara, K
Takekoshi, S
Nezu, Y
Harada, Y
Yogo, T
Teramoto, A
Osamura, R.Y
Tagawa, M
description Pituitary thyrotroph hyperplasia results from prolonged primary hypothyroidism in humans, mice and rats. In dogs with Cushing's disease, many cases have low serum thyroid hormones concentrations due to euthyroid sick syndrome. A 6-year-old castrated male Beagle diagnosed with Cushing's disease had a high serum thyroid stimulating hormone (TSH) concentration that was treated by hypophysectomy. On histological examination, the resected pituitary gland contained both a corticotroph adenoma and thyrotroph hyperplasia. The TSH-positive cell ratio in this case was greater than that of healthy Beagles. In the present case, the pituitary thyrotroph hyperplasia was probably caused by primary hypothyroidism. In conclusion, this Beagle is the first histological confirmation of the coexistence of a corticotroph adenoma and thyrotroph hyperplasia.
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The TSH-positive cell ratio in this case was greater than that of healthy Beagles. In the present case, the pituitary thyrotroph hyperplasia was probably caused by primary hypothyroidism. 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subjects ACTH-Secreting Pituitary Adenoma - complications
ACTH-Secreting Pituitary Adenoma - pathology
ACTH-Secreting Pituitary Adenoma - veterinary
ADENOMA
Adenoma - complications
Adenoma - pathology
Adenoma - veterinary
ADENOME
ADRENAL GLANDS
Animals
canine
CHIEN
corticotroph adenoma
Cushing's disease
Dog Diseases - pathology
DOGS
ENDOCRINE DISEASES
ENFERMEDADES GLANDULAS ENDOCRINAS
GLANDULA PITUITARIA
GLANDULAS SUPRARRENALES
HIPERPLASIA
HYPERPLASIA
Hyperplasia - complications
Hyperplasia - pathology
Hyperplasia - veterinary
HYPERPLASIE
HYPOPHYSE
Immunohistochemistry - veterinary
Male
PERRO
pituitary
Pituitary ACTH Hypersecretion - complications
Pituitary ACTH Hypersecretion - veterinary
PITUITARY GLAND
SURRENALE
thyrotroph hyperplasia
Thyrotrophs - pathology
TROUBLE ENDOCRINIEN
title Coexistence of corticotroph adenoma and thyrotroph hyperplasia in a dog
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