Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Mucosa around the ostia at the moment of surgical intervention-light microscopy. Maxillary sinus biopsy showing thickening of sinus mucosa, lymphoid follicle hyperplasia, cilia degeneration (black arrow head), diffuse and several infiltrate with mononuclear cells (black arrow), heterophils, and scattered eosinophils. H&E stain, bar = 20 μm.
