Brown tumor is characterized by atypical non-neoplastic bone lesions caused by an accelerated osteoclastic activity and peritrabecular fibrosis due to hyperparathyroidism, resulting in a local damage phenomenon. It is more common in large bones, ribs and pelvis, but can occur in any bone. We describe a case of a 55-year-old woman undergoing hemodialysis for eight years, with development of a lingual mass in the floor of the mouth, which was histologically diagnosed as a brown tumor. Radiological e clinical features are also described. Brown Tumor requires an early diagnosis and multidisciplinary follow up to avoid fractures, deformities and functional alterations.

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Mandibular angle fractures are common, with a high incidence among facial fractures.Epidemiological studies provide information on the profile of patients victims of facial trauma, assisting in methods of prevention and perfecting treatment procedures. This is a retrospective, longitudinal, and observational study, aiming to evaluate the epidemiology, etiology, frequency and type of treatment used, as well as complications, regarding mandibular angle fractures in patients treated at the Department of Oral and Maxillofacial Surgery, Faculty of Dentistry of Piracicaba -FOP/Unicamp, from April 1999 to December 2012. 201 patients with 204 mandibular angle fractures were included, showing higher incidence on the left side (55.9%), and a descriptive statistical analysis revealed the following prevalence: male subjects (88.6%), white subjects (52.2%), and mean age of 27.95 years ± 9.9 years. The majority had some kind of addiction (56.7%), the most common etiology was physical aggression (33%) and malocclusion was the sign with the highest incidence (72.6%), while the most frequent symptom was pain (75.6%) and 111 fractures (54.4%) had third molars in the line of fracture. Surgical treatment was employed in most fractures (78%), and intraoral access was the most frequent access used (60.0%). The fixation technique most often employed was the use of one 2.0 mm miniplate system (42.0%), with a low complication rate (9.5%) in the treatment of patients in this study. It was concluded that the most affected group consists of young adults male gender, victims of physical aggression and that most subjects underwent surgical treatment with few complications. Periodic assessments of the epidemiology and treatment characteristics of mandibular angle fractures generate data that assist in the establishment of prevention campaigns, clinical protocols for the treatment of these lesions, and also in directing future research.

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