A. Oryan, M. Hashemnia, A. Mohammadalipour and M. Gowharinia
Department of Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
ABSTRACT
A fibropapilloma tumour is a benign growth that is spread by a papilloma virus. This study describes the gross and histopathological characteristics of fibropapilloma in 2 camels. Two 18- and 24-month-old camels were presented each with a history of presence of a large mass on the metatarsal region. These were nodular proliferations, rough, greyish, with sizes between 3 and 4 cm in diameter. Histopathologically, the neoplastic proliferation of the connective tissue was so extreme that the lesion was primarily suspected as fibroma. The epidermis over the mass showed acanthosis and the stratified squamous epithelium was covered with a thick layer of orthokeratotic parakeratosis stratum corneum. The epidermis-dermis junction showed finger like projections of epidermal pegs extending deep into the fibromatous tissue of the dermis. The dermis consisted of irregular collagenous connective tissue with many fibroblasts, koilocytes including variably sized keratohyalin granules and a few intranuclear inclusion bodies. Hair follicle, sebaceous glands and other adenexae were not present in the dermis of these areas. Both these morphological patterns were defined as fibropapillomas.
Key words: Camel, fibropapilloma, gross pathology, histopathology, metatarsal
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