Cholesterol Granule of the Ethmoid Sinus: A Case Report.

Cholesterol granuloma (CG) is common in the mastoid air cells, less common in the skull base and orbit, and uncommon in the paranasal sinuses. The most commonly affected sinus is the maxillary sinus, and it is very rare in the ethmoid and sphenoid sinus. CG is thought to be due to impair the venous and lymphatic drainage from the sinus cavity.

Does nasal irrigation enter paranasal sinuses in chronic rhinosinusitis?

Background: Nasal irrigation is widely used in treating sinonasal diseases. Not only does it remove static secretions and promote mucociliary clearance, but, in chronic rhinosinusitis, nasal flush is also a potential route for topical drug administration into paranasal sinuses. A clinical study was conducted to investigate how well nasal irrigation could reach paranasal sinuses with the ostiomeatal units blocked in chronic rhinosinusitis.