There is still a lot we do not know about the population characteristics of patients with cholesteatoma, the condition you have been diagnosed with in the ENT clinic. This questionnaire will ask you for some general background information as well as some specific questions about your medical history so that we can learn more about any factors associated with the development of cholesteatoma. All information collected in this questionnaire will be confidential and will be handled in accordance with the General Data Protection Regulation (https://bit.ly/2zzSqmt