Frequency of intraendothelial `virus-like' particles: An electron microscopy study of 376 human renal biopsies

Abstract
Intraendothelial `virus-like' particles were found in all cases requiring a renal biopsy: in 89% of patients with systemic lupus erythematosus (SLE), in 73% of those receiving renal transplants more than one year before, and in 24·5% of all other renal biopsies.