Case report of a bilateral conjunctival-palpebral dermoid cyst in a German Shepherd dog
O Balland* and AS Poinsard*
*Centre Hospitalier Veterinaire Lorrainevet, 95 rue des Mazurots, 54710 Ludres, France
Purpose: Many types of ocular dermoids have been described in dogs. The conjunctivo- palpebral dermoid, for which a genetic predisposition has been identified, is less com- mon. Material/Methods: A four-month old male German Shepherd dog was referred to the veterinary hospital for consultation, following the development of corneal pigmentation in both eyes and ocular discomfort. Ocular examination revealed the presence of a bilateral, symmetrical, conjunctivo-palpebral dermoid affecting the temporal third of the lower eyelid. A bilateral diffuse corneal pigmentation secondary to chronic corneal irritation was also iden- tified. Results: The conjunctival dermoid was incised around its periphery, at the limit of the lateral palpebral conjunctiva adjoining the external canthus and the bulbar conjunctiva close to the corneo-scleral limbus. A V-shaped excision was continued ventrally, in order to achieve full excision of the dermoid and prepare the reconstruction of the free margin of the lower eyelid. The excised tissue was routinely processed for histopathologic analysis. All of the characteristics of a normal skin tissue were present, thus confirming the epidemio-clinical hypothesis of a conjunctival-palpebral dermoid. The functional result was satisfactory, with the complete resolution of any signs of pain or ocular irritation. Discussion: Although dermoids affecting the eye and adnexa are mostly unilateral, some authors have reported cases of bilateral dermoids. The genetic nature of this affection has been demonstrated in the cat, the cow, the horse and the human being. The bilateral and symmetrical conjunctivo-pal- pebral dermoid is an uncommon form, and has rarely been described in the literature. None.