Two Cases of Lymphoepithelial Cyst of the Pancreas: First – a Cyst Coexisting with a Primary Gastric Lymphoma, Second – Incidentally Found Pancreatic Cyst - Zieliñska-Pająk, E; Liszka, Ł; Pająk, J; Gołka, D; Lampe, P; Pilch-Kowalczyk, J; Mrowiec, S (Zeitschrift für Gastroenterologie, 2008)