functional endoscopic sinus surgery
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
Minimally invasive endoscopic surgery that restores drainage and ventilation of the paranasal sinuses.
He was listed for functional endoscopic sinus surgery after maximal medical therapy failed.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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