Figure 11From: A novel fungus concentration-dependent rat model for acute invasive fungal rhinosinusitis: an experimental study More mast cell (MC) infiltration in rat nasal peripheral connective tissue in all groups. No MC degranulation was found. (A. Toluidine blue staining, ×20; B. Tryptase immunohistochemical staining for MC infiltration, ×20).Back to article page