Ethmoidal polyps are multiple grape like extensions that arise from the ethmoid air cells, most often bilaterally. They cause signs and symptoms attributed to nasal obstruction- difficulty breathing and absent sense of smell. They are frequently found in patients who suffer from allergies. They are also found in cystic fibrosis. Treatment involves surgical resection via functional endoscopic sinus surgery. https://slidetodoc.com/nasal-polyposis-definition-nasal-polyps-are-nonneoplastic-masses/