Platelet Satellitism, an in vitro and rare phenomenon seen only in EDTA blood films. The platelets adhere to the neutrophils - cause largely unknown. The only clinical significance of this phenomenon is that the FBC produces a falsely low platelet count; it is similar to platelet clumping in that a genuine platelet count is sought after through citrated platelet counting. 
This image was taken at x100 on a 37-year-old female who came into a/e with pyelonephritis. Film otherwise normal.