Campylobacter pylori, gastritis, and peptic ulcer disease in central Africa.

this region without a pre-existing pilonidal sinus. In other sites infection or inflammation related to trauma is associated with the presence of a bursa- for example, olecranon bursitis and the parapatellar bursitides-but there was no evidence in our cases of an adventitious bursa at operation. It would be interesting, however, to survey a sample of jazz ballet enthusiasts to see whether any have an uninfected bursa in this site.