Ocular neoplasms in goats and sheep

Abstract

The left eye ball of one goat was smaller, and hard, and revealed disappearance of internal structures which were replacedwith dark mass of ciliary adenoma. Microscopically the tumour mass apparently originated from non-pigmented epithelium ofciliary processes and consisted of groups and columns of cells having little stroma in between them, In another goat theright eye revealed replacement of internal structures with a combined mass of schwannoma and ciliary adenoma, Schwannoma wasextending from optic disc. Neoplastic growth consisted of bundles of fibrous tissue like structure running in differentdirections. These interwoven bundles consisted of fusiform elongated cells lying roughly in the same directions. The cellswere placed together with moderate amount or intervening reticular tissue (Antony A arrangement) or parallel with each otherin regimented or pallisaded pattern (Antony B arrangement). Tumour mass also revealed foci of calcification. Ciliary adenomaoccurred separately to this tumor and was present in anterior portion of the eye ball. Squamous cell carcinoma in sheepoccurred as whitish cauliflower like growth protruding outwards on surface of cornea, microscopically containing typicalislands of stratified squamous epithelium containing centrally placed spherical or oval masses of keratin undergoinghyalinization, the so called "epithelial pearls".