Attic retraction pockets: Classification system

Abstract

Although attic retractions have previously been classified into Grades 0 through IV, it is often not possible to assign attic retraction pockets into a single specific category. The present study describes an improved classification system based on otoscopic and endoscopic visualization of the retraction pocket fundus, the ossicular status in the attic, degree of scutal erosion, and the presence or absence of cholesteatoma. One hundred and fifty-four patients (200 ears) with different grades of attic retraction pockets who were seen by a tertiary referral otology center between August 2015 and July 2018 were selected for this study. The new classification system (Grades I, IIa, IIb, IIIa, IIIb, IIIc, IVa, IVb, IVc, and V) was applied to these retraction pockets. Pure tone audiometry was obtained. All attic retraction pockets could be classified precisely using the new classification system. Forty-four of 200 (22%) of ears showed Grade I Attic retraction, 18 ears showed Grade IIa (9%), 14 showed Grade IIb (7%), 28 showed Grade IIIa (14%), 12 showed IIIb (6%), 20 showed Grade IIIc (10%), 16 showed grade IVa (8%), 12 showed grade IVb (6%), 28 showed grade IVc (14%), and eight showed grade V (4%) attic retraction pockets. Grades I, IIa, IIb, IIIa, and IVa had no significant hearing loss. Average hearing loss was 42 dB and 52 dB in Grades IIIb and IIIc, 44 dB and 58 dB in Grades IVb and IVc, and 61 dB in Grade V. 5 Laryngoscope, 130: 2034-2039, 2020.