A Non-interventional Observational Study to Assess Long-term Efficacy and Safety of Dupilumab for the Treatment of Patients (>= 12 Years) With Eosinophilic Esophagitis Under Real-world-conditions in Germany

This is a longitudinal, observational non-interventional study (NIS) designed to characterize the patient population who receives dupilumab for eosinophilic esophagitis (EoE) treatment in a real-world setting in Germany with respect to their medical history, socio-demographic and disease characteristics, comorbidities (including type 2 inflammatory and atopic conditions), concomitant therapies and prior EoE treatments. Furthermore, this NIS aims to describe the long-term effectiveness of dupilumab for the treatment of EoE as assessed by the treating physician and reported by the patient, and its effect on health-related quality of life (HRQoL) during an individual observational period of two years. In addition, data on real-world use patterns and long-term safety data of dupilumab treatment for EoE will be collected.

The study duration for each participant is planned to be 2 years. Total study duration is approximately 4 years.

Inclusion Criteria:

• Patients diagnosed with EoE who are inadequately controlled by, are intolerant to, or who are not candidates for conventional medicinal therapy
• Patients for whom the treating physician has decided to initiate new treatment with dupilumab for EoE according to EU-SmPC independently from entry in study or for whom treatment with dupilumab for EoE according to EU-SmPC has been started within the last 7 days. The decision to initiate dupilumab treatment is made by the treating physician and the patient according to the patient´s medical need and to the standard of best medical practice. This decision is made independently and before inclusion in this NIS.
• ≥ 12 years of age at baseline visit
• ≥ 40 kg bodyweight
• Voluntary study participation and signed written informed consent by patient and parent(s)/guardian(s), if applicable

Exclusion Criteria:

• Patients who have a contraindication to dupilumab according to the current EU-SmPC.
• Patients who have been treated with dupilumab for more than 7 days
• Any acute or chronic condition that, in the treating physician´s opinion, would limit the patient´s ability to complete questionnaires or to participate in this study or impact the interpretation of the results.
• Participation in an ongoing interventional or observational study that might, in the treating physician´s opinion, influence the assessments for the current study (parallel inclusion in another Sanofi-independent registry might be possible if the patient gives consent)