Acquired cholesteatoma: classification and outcomes.

OBJECTIVE: Reclassification of acquired cholesteatoma into the commonly observed presentations of this condition to provide a simple and clear grouping that indicates the pathology, management, and outcomes of the group cases. PATIENTS: Virgin acquired cholesteatoma cases from a single center managed from 1986 to 2008 (515 cases).
INTERVENTIONS: Cases were managed by transcanal (20%) or intact canal wall techniques. Wall repairs successively used autograft cartilage (transcanal and early intact canal wall mastoidectomy cases), hydroxylapatite plates (1989-2007), or titanium sheeting (2007). Drum repairs used cartilage-perichondrial composite grafts. Assembly techniques were the preferred ossiculoplasty method.
RESULTS: Distribution: attic, 41%; pars tensa, 45%; and combined attic-pars tensa, 14%. Unclassifiable cases (n = 14) were excluded. Contralateral disease was present in 15% and effusions in 34% during or after surgery. Cell formation was most extensive in attic disease, least in combined patterns. Ossicular pathology was worse in the collapsed drum cases. Attic cases had the best hearing outcomes but risked recurrent disease, which required precise countermeasures. Overall, the combined pattern group carried the worst prognosis.
CONCLUSION: Compared with previous methods, the clinical classification proved simple, descriptive, and comprehensive. It provides a readily discerned practical basis for clinical management and research purposes.