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Canine tonsillar polyps: characteristics, classification and review of the pathogenesis

Molin, J; Vilafranca Compte, M; Suárez-Bonnet, A; Altimira, J; Ramírez, G


J Molin

M Vilafranca Compte

A Suárez-Bonnet

J Altimira

G Ramírez


Canine tonsillar polyps are uncommon. We describe 14 tonsillar polyps in dogs and review their classification and pathogenesis. All dogs were adult (3-13 years old). Females (10/14) were more affected than males (4/14). Most of the lesions were asymptomatic (10/14). All lesions were unilateral, pedunculated (9/14) or sessile (5/14), with a smooth (12/14) or papillary/verrucous surface (2/14). Histologically, polyps consisted of benign proliferation of lymphatic vessels, blood vessels, fibrous tissue and lymphoid tissue in variable proportions, with occasional adipose tissue (4/14). According to the main stromal components, polyps were categorized as lymphangiomatous (5/14), lymphangiolipomatous (2/14), lymphangiofibromatous (2/14), angiofibromatous (1/14), angiofibrolipomatous (1/14), lymphoid (2/14), and myxomatous (1/14).
As the pathogenesis of these polyps remains unclear, we propose to replace the term inflammatory tonsillar polyp by a morphological diagnosis based on the stromal characteristics of the lesions. Simple surgical excision was curative in the 9 cases with available follow-up information.


Molin, J., Vilafranca Compte, M., Suárez-Bonnet, A., Altimira, J., & Ramírez, G. (2020). Canine tonsillar polyps: characteristics, classification and review of the pathogenesis. Veterinary Pathology,

Journal Article Type Article
Acceptance Date Oct 11, 2020
Publication Date Nov 18, 2020
Deposit Date Oct 13, 2020
Publicly Available Date Dec 9, 2020
Journal Veterinary Pathology
Print ISSN 0300-9858
Publisher American College of Veterinary Pathologists
Peer Reviewed Peer Reviewed
Public URL


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