Abstract
The prognostic significance of splenic follicle (B-lymphocyte compartment) size was studied in 62 patients splenectomized for idiopathic thrombocytopenic purpura (ITP). Patients with hyperplasia of splenic follicles (mean follicle diameter greater than 500 micron) were more likely to relapse or to develop additional autoimmune disorders than patients without hyperplastic splenic follicles (mean follicle diameter less than 500 micron) (p less than 0.01). The enlargement of splenic follicles had a positive predictive value of 27% and a negative predictive value of 100% for a poor outcome of splenectomy. Thus, the histological examination of spleens surgically removed for ITP seems to be an appropriate method to obtain the first indication of the possible long-term effect of splenectomy almost immediately after the operation.
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