Fig. 4

Pancreatic tissue obtained by a conventional 22-gauge needle. a A microscopic image of Hematoxylin–Eosin (HE) staining shows a rather small amount of tissue with substantial fibrin and neutrophils. This tissue proved insufficient for a histological evaluation (yellow ellipse). This case was identical to that in Fig. 3b. b A microscopic image of HE staining shows a rather small amount of tissue with substantial blood. This tissue proved insufficient for a histological evaluation (yellow rectangle). This case was identical to that in Fig. 3c