Cytological diagnosis of unifocal Langerhans cell histiocytosis in the temporomandibular joint.

Unifocal Langerhans cell histiocytosis (LCH) presents as a solitary focal bone lesion characterized by clonal proliferation of CD1a (+) and langerin(+) dendritic cells, derived from the bone marrow. In 38-69% of cases BRAF-V600E mutation is revealed. It gains attention to maxillofacial surgeons due to involvement of the orofacial region and early onset of jaws symptoms.

An epidemiologic analysis of 1,142 maxillofacial fractures and concomitant injuries.

Objective: The aim of this study was to evaluate the incidence and etiology of maxillofacial fractures in the Greek population over the past 5 years. A comparison of findings with 2 earlier studies from the same department was also performed.

Study Design: Seven hundred twenty-seven patients treated for a total of 1,142 facial fractures in the period from 2005 to 2009 were included in a retrospective, clinical, and epidemiologic study.