Marcus Overhaus1
, Pan Decker1
, Hans Peter Fischer2
, Hans Jochen Textor3
and Andreas Hirner1 
1Department of General-, Visceral-, Thoracic- and Vascular Surgery, Sigmund Freud Str. 25, 53105 Bonn, University of Bonn, Germany
2Department of Pathology, Sigmund Freud Str. 25, 53105 Bonn, University of Bonn, Germany
3Department of Radiology, Sigmund Freud Str. 25, 53105 Bonn, University of Bonn, Germany