CCL4 and nasal cavity polyp: Furthermore, CCL4 levels were significantly higher in nasal polyps with rich eosinophils (>100/high power field [HPF]) than in those with poor eosinophils (<100/HPF) or without eosinophils, and they were positively correlated with eosinophil count in nasal polyps and with peripheral eosinophil number (Figure 1A).