Thyroid Cancer (Adenocarcinoma) in Dogs

Adenocarcinoma of the thyroid gland is a malignant tumor, which can metastasize to other tissue and organs, including the lungs. 

The thyroid gland is responsible for a variety of bodily functions, most notably the coordination of hormones and normal metabolism. This particularly malignant form of cancer, carcinoma is characterized by its ability to spread quickly throughout the body. Adenocarcinoma is differentiated only in that it originates in the glandular tissue. As iodine is essential for the thyroid to function normally, this neoplasm has been found to be more prevalent in iodine-deficient areas.

Boxers, beagles and golden retrievers are at a higher risk of this tumor although adenocarcinoma can occur in any breed. Additionally, adult dogs are more prone to this condition but young dogs can also be affected.

Following symptoms are related to adenocarcinoma of thyroid.

Large fixed or movable mass over dog’s trachea covering larynx

Difficulty breathing (dypnea)

Difficulty in swallowing (dysphagia)

Weight loss

Hoarseness (dysphonia)

Increased thirst (polydipsia)

Increased amount and/or frequency of urine passing (polyuria)



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