Bilateral corneoconjunctival dermoids and nasal choristomas in a calf
A 5-day-old Angus x Hereford calf presented for bilateral haired masses on the eyes and nasolabial planum since birth. The masses were surgically excised from the inferonasal cornea and bulbar conjunctiva of both eyes and the left and right side of the dorsomedial nasolabial planum. Histopathology of the excised tissue confirmed bilateral corneoconjunctival dermoids with ectopic lacrimal glands, and bilateral nasal choristomas and ectopic nasal glandular tissue. Surgery was curative and healing was uneventful. Bilateral ocular dermoids in combination with nasal choristomas and ectopic glandular tissue have not been documented previously in cattle.
D K. Brudenall, D A. Ward, and Shelley Newman. "Bilateral corneoconjunctival dermoids and nasal choristomas in a calf" Veterinary Ophthalmology 11.3 (2008): 202-206.