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  • Title: Metastatic endocervical adenocarcinoma in a western lowland gorilla (Gorilla g. gorilla): no evidence of virus-induced carcinogenesis.
    Author: Olias P, Schulz E, Ehlers B, Ochs A, Mundhenk L, Klopfleisch R.
    Journal: J Med Primatol; 2012 Apr; 41(2):142-6. PubMed ID: 22273046.
    Abstract:
    BACKGROUND: Cervical Cancer is the second most common cancer among women. Nevertheless, similar tumours have only been rarely described in Great Apes. This report characterizes the pathological and molecular features of a metastatic endocervical adenocarcinoma in a Western lowland gorilla (Gorilla g. gorilla). METHODS: Necropsy and histopathology was performed to identify the cause of the disease in an cachectic 50-year-old western lowland gorilla. Immunohistochemistry for Ki67, oestrogen receptor alpha and ERBB2 was performed to characterize the tumor. In addition, Pan-herpesvirus and Pan-papillomavirus PCR were used to identify a possible viral cause. RESULTS: The endoccervical carcinoma showed a severe metastatic spread to the lung, brain and bone and was herpesvirus and papillomavirus-negative. Most tumor cells were ERBB2-positive, 15% of tumor cells were Ki67-positive and only few tumor cells had oestrogen receptor alpha expression. CONCLUSIONS: Histopathologically and immunohistochemically, the tumour had striking similarities to human endocervicial adenocarcinomas of the common type. However, PCR analysis failed to identify herpes- or papillomaviral DNA in the tumor at the time of necropsy, thus leaving the question for cause of the disease open.
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