[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.

[Complications in Le Fort facial fractures combined with craniocerebral trauma]. / Uslozhneniia pri frakturi v srednata zona na litseto, s'chetani s cherepno-moz'chna travma.

The present research is based on the most frequent traumas and fractures in the middle zone of the face (second and third type by Rene le Fort) and the proceeded from them complications for a period of four years in the clinic of Neurosurgery in NIUMN "Pirogov". From the 280 patients that were studied the complications were observed in 54 of them. We worked up the received results statistically and presented them in drawing.