| 释义 |
retraction pockets retraction pocketssmall areas of retraction of the tympanic membrane due to chronic negative pressure in the middle ear that can lead to formation of cholesteatoma.re·trac·tion pock·ets (rĕ-trak'shŭn pok'ĕts) Small areas of retraction of the tympanic membrane due to chronic negative pressure in the middle ear that can lead to formation of cholesteatoma. |