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

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

Abstract

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.

Citation

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: https://rvc-repository.worktribe.com/output/1375284