Eighteen Wistar rats were exposed for 24 d to an electromagnetic field and water. The tongue, mucous membrane of the cheek wall, and the parotid gland were examined histopathologically. The examination showed slight differences in the histological structure of the tongue muscles and mucous membrane of the cheek wall between the experimental and control groups. In the tissues of the tongue from experimental animals, extensive extravasations in the tunica muscularis were observed. In sections of the parotid gland of these animals, slight lymphoid cell infiltrations, and masses of various consistency and colour, from yellow to brown, were noted in the lumen of the parotid ducts.
The objective of this study was to evaluate the usefulness of the laparoscopic technique for performing a biopsy of the gastric and duodenal wall in dogs. Endoscopic examinations were performed in five dogs, which were not conclusively diagnosed based on symptoms and the results of clinical and laboratory tests. A histopathological analysis of laparoscopically collected tissue samples supported the diagnosis of a chronic inflammation of the gastric and duodenal wall. The results of the experiment indicate that laparoscopy permits accurate mapping of the biopsy site and supports the collection of tissue samples for histopathological analyses.
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