Resumo

MANSILLA, M.; VEUTHEY, C.; VASCONCELLOS, A.  e  PENA, P.. CYSTIC TERATOMA DERMOIDE OF THE CORNEA-CONJUNCTIVA IN A GERMAN SHEPHERD DOG (Canis familiaris): A CLINICAL CASE. Rev. chil. anat. [online]. 2000, vol.18, n.2, pp. 273-277. ISSN 0716-9868.  doi: 10.4067/S0716-98682000000200009.

The cystic teratoma dermoid (TDQ) it is a neoplasia coming from pluripotent stem cells that have been trapped in remote regions, and whose expression will give origin to ectopic tissues. Their location is varied and it is not very frequent at ocular level. Their clinical importance resides in the fact that when it affects the eye, chronic irritation and severe visual difficulties that forces its prompt extirpation. The dermoid of ocular localization, can affect animals as well as man, and in general they lodge in the limbo, third lid, cornea, partly on the conjunctiva, and in rare cases, with extension toward the palpebral tegument (JENSEN, 1971; WALDE et al., 1990; SLATTER, 1992; MOORE, 1999; STADES et al., 1999). The objective of the present study was to present the clinical and histopathological analysis of a TDQ case, located in the cornea conjunctiva, in a German Shepherd dog. The extraction of the tumor was carried out by surgical resection, according to a technique described by KASSEN & HASSIEB (1986) and modified by SLATTER (1992) and later on by STADES et al., with which the animal totally recovered the vision. The histopathological study of the extracted tissue confirmed the diagnosis of cystic teratoma dermoid cornea conjunctiva. This benign neoplasia generally presents derived tissue of the ectoderm (skin and annexes) like the present case, but, besides the skin with all its components, it was observed the presence of hyaline cartilage and smooth muscle fibers that are elements of mesoderm origin. The particular embryonic origin of the TDQ of the present case, its development and cornea conjunctiva location, the animal species and its scarce presentation frequency, together to the success of the surgical technique and the patient's total recovery, among others, make the present report one of particular interest

Palavras-chave : Teratoma dermoid; Eyeball; Dog; Surgical.