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Introduction. Metastatic renal cell carcinoma can spread from the primary renal cell carcinoma to other organs, practically to all tissues. Distant metastases – to the tissue of the head and neck – are transferred through the blood and lymph vessels. A case of such a metastasis localized on the palate is relatively rare and therefore poses interesting material for description. Objective. Analysis of a case of cell renal carcinoma meastasis of the palate in a 67-year-old patient, based on clinical observations and medical publications. Conclusion. Clear cell carcinoma metastases to distant organs are often the first sign of a covertly progressing disease of which the primary tumour is localized in the kidney. The treatment is surgical, and prognosis is poor in the case of distant metastases since tumours recur even after a few years.
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.
Fungi belonging to Candida genus, especially C. albicans play an important role in microflora of oral cavity. Microbial colonisation process taking place within oral cavity is inseparably related to formation of multispecies biofilm, i.e. dental and denture plaque. A mature fungal biofilm is a heterogeneous three-dimensional dense conglomeration of mixture of di!erent morphological forms: blastospores, germ tubes, pseudohyphae and hyphae surrounded by the extracellular polymeric matrix. Composition and specific properties of substratum, saliva and yeasts as well as multiple intricate interactions between all of them influence the ability of Candida spp. isolates to adhere and colonise both natural and artificial surfaces, followed by biofilm formation. Obviously, specific complex host-pathogen interactions also should not be neglected. A lot of additional factors like poor oral and denture hygiene, low pH under prosthesis, sufficient concentration of sugar and iron or antibody titres influence Candida adhesion and colonisation of acrylic resin base. C. albicans is capable of inducing a variety of superficial diseases of the oral mucosa. The most common clinical form of oral candidal infection related to biofilm formation a!ecting a great deal of denture wearers is denture-associated stomatitis, also known as chronic atrophic candidiasis or erythemateous candidasis. Development of C. albicans biofilm on a denture surface constitutes a difficult and hard to resolve problem which may concern every single prosthesis-wearer. Thus, careful oral and denture hygiene is highly recommended for the population of artificial teeth wearers.
The aim of the work was to compare adhesive properties of Candida albicans strains isolated from the oral cavity in HIV+ vs. HIV- persons. The materials were Candida albicans strains and buccal epithelial cells isolated from both HIV+ and HIV- persons. We applied the in vitro adherence test, primarily described by Kimura and Pearsall and modified by Macura. The strongest adherence was found between both fungi and epithelial cells isolated from a HIV+ person. The adherence of C. albicans isolated from HIV+ patients was significantly stronger to epithelium collected from HIV+ than HIV- persons.
Foods rich in sugar are an excellent substrate for the microorganisms that inhabit the initial sections of the gastrointestinal tract, and one of the most commonly available sources of sugar is the sweetened drink. Students represent an interesting sub-population; the large number of classes and associated stress levels promote fixing of unhealthy behaviors, e.g. tendency to consume a lot of sweetened drinks, for example cola-type or energetic drinks. Aim of this study was to determine the relationship between the amount of sugar consumed in beverages and the prevalence of fungi in the oral cavity. The investigated material consisted of oral washings. Participants completed original questionnaire regarding beverages consumed. The relationship between the consumption of sweetened beverages and risk of the presence of fungi in the oral cavity was determined. Fungi were isolated from 68.1% of examined subjects. Seven species of the genus Candida were observed. Higher prevalence of fungi was seen in the oral cavity of subjects who declared consumption of beverages containing sugar. 37.8% of respondents were found to consume with beverages doses of sugar exceeding the recommended daily requirement. Significantly greater prevalence of oral cavity fungi was noted in those exceeding the recommended GDA (76.3%), compared to of those who were not (68.7%). There were positive correlations between occurrence of fungi and consumption of sweetened carbonated drinks or adding sugar to coffee and tea. The addition of sugar to coffee/tea and sugar consumption above the recommended daily amount significantly increases the risk of colonization of the oral cavity by fungi. Students, due to invalid nutritional habits especially excessive consumption of beverages containing large amounts of sugar, belong to a group with a predisposition to the occurrence of fungi in the oral cavity.
There are numerous studies suggesting that inflammation of the oral cavity caused by bacteria or fungi is accompanied by gastric inflammation. This is particularly relevant in patients using complete dentures. Since the presence of H. pylori in the oral cavity can be easily discovered by bacteria culture and that in the stomach by 13C urea breath test (UBT) and histology of gastric endoscopic biopsy samples it is reasonably to state that the majority of the patients show the presence of bacterium in oral cavity and active gastric H. pylori infection. When comparing, however, the bacteria culture originating from the oral mucosa to those from the gastric mucosa, employing molecular biology examination, such as polymerase chain reaction (PCR), we found that the oral bacteria and those originating from stomach are completely different, suggesting that H. pylori may be present only transiently in oral cavity and does not play major role in gastric H. pylori infection. Thus, oral cavity does not serve as bacterial reservoir to infect gastric mucosa. Most important finding of our study is that patients with recognized inflammation in the oral cavity in the form of stomatitis prothetica hyperplasica both fibrosa as well as papillaris showed in nearly 100% gastric H. pylori infection, usually without the presence of the same bacterium in the oral cavity, suggesting that gastric H. pylori infection affects oral mucosa at distance by some, as yet, unknown mechanism.
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