Can the wet suction technique change the efficacy of endoscopic ultrasound-guided fine-needle aspiration for diagnosing autoimmune pancreatitis type 1? A prospective single-arm study

Figure 3 The features of a patient with autoimmune pancreatitis diagnosed by endoscopic ultrasonography-guided fine-needle aspiration with a wet suction technique. A: The pancreatic tail is swollen with a capsule-like rim sign as observed on abdominal computed tomography; B: Specimen acquired by wet suction technique (WEST) endoscopic ultrasonography-guided fine-needle aspiration (EUS-FNA) (HE × 200): IgG4-positive plasma cells were observed; C: Specimen acquired by WEST EUS-FNA (EM × 200): obliterative phlebitis was observed; D: Specimen acquired by WEST EUS-FNA (HE × 400): fibrosis with a storiform pattern of plasma cells was observed.