SUMMARY Fibrin stabilising factor (FSF) was studied in the circulating blood of 196 children. These 196 children comprised three groups: 131 controls (group A), 20 children with diseases of potential repercussion on FSF determination (group B), and 45 children with Schonlein-Henoch syndrome (group C). Determinations from groups A and B produced normal values, but results from group C were significantly lower at the onset of the vasculitis. Seventeen children with Schonlein-Henoch syndrome have had complications, in 7 of whom these were severe. The decrease in FSF levels was correlated with the severity of such complications, and an increase in FSF was associated with recovery. Determination of FSF activity appears to help in the diagnosis of Schonlein-Henoch vasculitis, as well as helping to monitor the course of the disease and assessing the risks of complications.
A three-year-old girl who had for two months suffered bruising after minimal injury was admitted because of diffuse ecchymoses and a large haematoma hindering elbow movement. These symptoms were attributable to the development of antifactor VIII inhibitor. No definite etiology was evident despite repeated immunological investigation. Although the inhibitor still persisted at high levels after two years, no further haemorrhage occurred, excepted haematomas three months after the onset of symptoms, in association with mumps.
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