Henoch - Schonlein Purpura Nephritis the incidence of what?

The disease often occur in children under the age of 10 and adults ( "20 years old) rare. Occurs in cold season. About 1 / 3 patients with bacterial and viral infections and other pioneer history, but could not prove with certainty streptococcal infection relations. About 1 / 4 patients with fish, shrimp allergy or vaccination, drugs. Most patients were benign, self-limited process, in most recover within a few weeks. But there are also recurrent or persistent few months, a few years, about 50% of patients course repeated attack. On Henoch - Schonlein purpura nephritis Henoch - Schonlein purpura in the incidence of various reports, Nantong Medical College Professor Qian Tong-sun Statistics reported 2,840 cases at home and abroad, Purpura Nephritis who accounted for 37.6%. 