A sebaceous carcinoma was diagnosed, together with a mammary carcinoma, in an adult African hedgehog (Atelerix albiventris). The first neoplasm was located in the subcutaneous tissue of the neck and extended towards the axillary area of the chest. The second was located in the subcutaneous left caudal abdominal region. The purpose of this paper is to report the histopathologic and ultrastructural features of these neoplasms. Although there is little information about diseases affecting this species, it is known that neoplastic disorders are fairly common in African hedgehogs. The mammary carcinoma is considered to be the most common neoplasm in these animals; however, the presentation of sebaceous carcinoma is rare. In hedgehogs, the simultaneous presence of two neoplasms is common, which is why special attention should be paid to the presentation of other tumors during the early detection of a neoplastic process as this will greatly facilitate the optimal treatment and improve the long-term prognosis of affected animals.
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