[The brown tumour in untreated hyperparathyroidism].

The brown tumour (osteitis fibrosa cystica) is a rare, non-neoplastic, expansively growing lesion containing giant cells. Hyperparathyroidism (hyperparathyroidism [HPT]) leads to the development of a brown tumour in 2 to 3 percent of cases. This can manifest itself in any part of the skeleton.

Influence of obesity on the outcome of non-surgical periodontal therapy - a systematic review.

Background: Obesity and periodontitis are important chronic health problems. Obesity is associated with an increased prevalence of periodontitis. Whether obesity also affects the outcome of non-surgical periodontal therapy is to date still unclear.