Results: In recurrent acute rhinosinusitis, CT Scan reveals the natomic variants: Haller cells, 2 sides (1/8), concha bullosa P (3/8), concha bullosa T (1/8), septum deviation (6/8) with occluded OMC (8/8); histological evolution reveals damage of uncinate process, ethmoid mucosa and bone with acute and subacute inflammation of mucosa and bone, minor loss of ciliary.