Ficoli-1 rich granules are a relatively new fourth neutrophil granule population that is enriched in the microbial lectin ficolin-1. Ficolin-1 is present in tertiary granules, but ficolin-1 rich granules can be differentiated by having low levels of gelatinases and an elevated exocytosis propensity (Rorvig et al. 2009, 2013). The importance of these granules may be to provide rapid release of pattern recognition molecules to activate the lectin complement pathway (Rorvig et al. 2009).