[Dermoid, epidermoid and teratoma cysts of the tongue and oral cavity floor]. / Dermoidni, epidermoidni i teratomni kisti na ezika i poda na ustnata kukhina.

Most dermoid cysts in the oral cavity floor are derived from epithelial debris or rests, enclaved during midline closure of the bilateral first and second branchial arches. They may also result from ectodermal differentiation of multipotential cells, most likely pinched off at the time of anterior neuropore closure. Congenital epidermoid cysts and teratomata of the tongue may be explained in a similar manner. Only 6.9 per cent of dermoid cysts observed in humans involve the head and neck regions. Treatment consists in complete surgical removal, with excellent prognosis in cases free of complications. This is a report on a rare case of epidermoid cyst, described because of its unusual location and cell population variation of the epithelium lining the cystic cavity.

[Gastroduodenitis and ulcers--statistical study for 1998]. / Gastroduodenit i iazvena bolest--statistichesko prouchvane za 1998 g.

The ulcer disease is a chronic, cyclical and recrudescing illness, based on disturbing of the regulatory mechanisms of the stomach and duodenum. The ulcer disease is one of the social significant illnesses of our century, because approximately 10% of the people at least once in their life have clinical symptoms of ulcus duodeni.