This case report describes two incidents of neoplasia in the oral cavities of two goats, mother and daughter. Both animals first attracted their owner's attention due to reduced feed intake and drop in milk yield. In both cases the authors found tumorous tissue in the oral cavity. The does were closely related to one another and were kept on the same farm under same housing and feeding conditions. In case of the younger goat, the histopathological investigation of the biopsy revealed a spindle cell sarcoma. Due to morphological alterations the tumour was defined as fibrosarcoma. In case of the mother goat the histopathological examination resulted in an ulcerated malignant blastoma of uncertain origin. However, the neoplastic change involves elements of presumed endodermal and mesenchymal origin. Moreover, in the Lymphonodi retropharyngei, metastases of the malignant blastoma were proven. 90 per cent of the tissue in Lymphonodus retropharyngeus lateralis sinister was already altered tumorously.
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