Hypocomplementemic urticarial vasculitis: report of a 12-year-old girl with systemic lupus erythematosus.

Urticarial vasculitis, a form of leukocytoclastic vasculitis involving the postcapillary venules, is classified as a type III hypersensitivity reaction and has been associated with connective tissue disease. The lesions resemble urticaria and typically persist for more than 24 hours. Urticarial vasculitis usually affects young women, and the diagnosis is confirmed at histologic examination.

A prospective study of the effect of fracture on measured physical performance: results from the MacArthur Study--MAC.

Objective: To examine the impact of fractures on measured physical performance and to assess whether specific fractures have unique sequelae.

Subjects: 762 men and women, aged 70 to 79 at baseline, who were part of the MacArthur Study of Successful Aging.

Design: A longitudinal case-cohort: those with prevalent fractures at baseline were excluded; cases were persons with a medically diagnosed hip, arm, spine, or wrist fracture during the follow-up period (1988-1995).