Diagnostic Yield of FNA Needle and FNB Needle for Autoimmune Pancreatitis

Inclusion Criteria: * Patients referred for EUS-guided tissue acquisition because of clinical suspicion of AIP * Age \> 18 years * Written informed consent Exclusion Criteria: * Known bleeding disorder that cannot be sufficiently corrected with co-fact or fresh frozen plasma (FFP) * Use of anticoagulants that cannot be discontinued in order to guarantee an INR below 1.5 * Previous inclusion in the current study * Pregnancy