Purpose: Differences in the definition and classification of cholesteatoma hinders comparing of surgical outcomes of cholesteatoma. Uniform registration is necessary to allow investigators to share and compare their findings. For many years surgical cholesteatoma procedures were divided into two main groups: canal wall up mastoidectomy (CWU) and canal wall down mastoidectomy (CWD). Recently, mastoid obliteration can be added to both procedures. Because of great variation within these main groups, the International Otology Outcome Group (IOOG) proposed the new SAMEO-ATO classification system to categorize tympanomastoid operations. The aim of our study was to correlate the mastoid bone extirpation (M-stage) with the contemporary (CWU, CWD with or without obliteration) system. Methods: Demographic characteristics and type of performed surgery were registered for 135 cholesteatoma patients from sixteen hospitals, both secondary and tertiary care institutions, across the Netherlands. In addition, the surgical reports were collected, retrospectively classified according to the contemporary system and the new system and compared. Correlations of the outcomes were calculated. Results: In total, there were 112 CWU and 14 CWD (both with or without obliteration) suitable for correlation analysis. Z test for correlation between the M-stage and CWU procedure was significant for M1a and M1b procedure and significant for M2c with the CWD procedure. Conclusion: The newly proposed SAMEO-ATO classification seems to be more detailed in the registration of surgical procedures than surgeons currently are used to. All M-stages of the SAMEO-ATO system are correlating well to the standard CWU and CWD except one ‘in between’ M-stage.
|Number of pages||6|
|Journal||European Archives of Oto-Rhino-Laryngology|
|Publication status||Published - 2021|
Bibliographical noteFunding Information:
We would like to thank Dr. B.I. Lissenberg-Witte (Epidemiology and Biostatistics Department of Amsterdam UMC, Amsterdam, The Netherlands) for the statistical assistance in this study.
The DCD study done by Fleur A. ten Tije, Sophia E. Kramer, Robert Jan Pauw and Paul Merkus was financially supported by etc. Fleur A. ten Tije, Sophia E. Kramer, Robert Jan Pauw and Paul Merkus were financially supported by The Netherlands Organization for Health Research and Development (ZonMw) (Grant 80-83700-98-16504), Zorgverzekeraars Nederland (ZN) and Stichting Het Heinsius-Houbolt foundation. For the remaining authors none were declared. Acknowledgements
© 2020, The Author(s).