Carcinoma de células escamosas en un Camelus dromedarius. Reporte de un caso

Abstract

The aim of this study was to report a squamous cell carcinoma in a Camelus dromedarius. A 7-year old, intact male dromedary camel had progressive right hock joint swelling and lameness for 9 months and a proliferative chronic wound granulomatous appearance unresponsive to conventional treatment. Radiographs showed multifocal lytic lesions in the tarsal bones. Surgical biopsy of the skin lesions in the right hock joint was performed for histopathological study, bacterial and fungal culture. At clinical, the hock showed a mass white to pale pink, supurative areas, firm, proliferative chronic wound granulomatous appearance and soft tissue mass was located on the plant side aspect of the right and lateral tarsal joint. The masses infiltrated all the tarsal bones and the proximal region of the metatarsal bone. The joint capsule was diffusely thickened. On microscopic examination, the section showed predominantly ulcerated, atrophic epithelium invading into the underlying connective tissue. The anaplastic or atipical cells were arranged in islands of varying size. Numerous keratin pearls and few mitotic figures with cellular and nuclear pleomorphism and hyperchromatism were also seen. Minimal chronic inflammatory cells were seen in the intervening stroma between the tumor islands. Areas of necrosis were also present. A diagnosis of well-differentiated squamous cell carcinoma was given. Squamous Cell Carcinoma arising from around the skin was diagnosed based on the histopathological evaluation.