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Third eyelid gland neoplasms of dogs and cats: a retrospective histopathologic study of 145 cases
Author(s) -
Dees D. Dustin,
Schobert Charles S.,
Dubielzig Richard R.,
Stein Timothy J.
Publication year - 2016
Publication title -
veterinary ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.594
H-Index - 50
eISSN - 1463-5224
pISSN - 1463-5216
DOI - 10.1111/vop.12273
Subject(s) - cats , eyelid , pathology , medicine , retrospective cohort study , anatomy , radiology
Purpose To describe the various types of primary neoplasms affecting the third eyelid ( TEL ) gland of dogs and cats. Methods A retrospective search of the Comparative Ocular Pathology Laboratory of Wisconsin ( COPLOW ) database was performed. Veterinary ophthalmologists, primary care veterinarians, and, when appropriate, owners were contacted for patient follow‐up information. Patient data points collected included species, age, sex, breed, laterality, tumor type, surgical margins, recurrence, metastasis, and length of follow‐up. Results A total of 127 canine and 18 feline cases met the inclusion criteria. The most common canine TEL gland tumor was adenocarcinoma ( n = 108; 85.0%) followed by adenoma ( n = 18; 14.2%) and squamous cell carcinoma ( SCC ) ( n = 1; 0.8%). For canine cases with follow‐up information available ( n = 62), 8.1% had confirmed or suspected metastasis and 11.3% had confirmed or suspected local recurrence of disease. The most common feline TEL gland tumor was adenocarcinoma ( n = 15; 83.3%) followed by SCC ( n = 3; 16.7%). For feline cases with follow‐up information available ( n = 9), 40.0% had confirmed or suspected metastasis and 30.0% had confirmed or suspected local recurrence of disease. Conclusions This study determined that adenocarcinoma was the most common third eyelid gland tumor in both dogs and cats. The overall survival times were less, and metastatic occurrence and recurrence rates appeared to be higher for feline tumors as compared to those diagnosed in dogs. This is the first report of SCC originating from glandular ductular epithelium.