Intrathecal injection of a hypodense sodium fluorescein solution permits a more precise, rapid, and safe endoscopic approach, with no need to place the patient in the Trendelenburg position or to wait for a long period of time before starting the surgical procedure.
Recovery of the maxillary sinus mucosa of patients with CRS, observed by electron and light microscopy, was incomplete 1 year after endoscopic surgery, even in nonsymptomatic patients; nevertheless, these alterations were more important in symptomatic patients than in asymptomatic patients.
The pattern of respiratory virus seasonality found in nasal mucosa, polyps, and paranasal sinus samples in patients with CRS reinforces the possibility of asymptomatic respiratory viral infections.
endoscopic DCR proved to be a safe and low morbidity technique, which also avoids facial scars and maintains the mechanism of the lachrymal pump, with results similar to those obtained with external DCR.
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