Surgical assistance system and representation method

The present disclosure relates to a surgical assistance system (1) comprising: a representation device; an endoscope (2) having a distal imaging camera (6) adapted to create an in vivo image (IA) of the patient (P); a data providing unit adapted to provide digital 3D photographic data (3DA) of the patient (P); and a control unit (12) adapted to process an in vivo image (IA) of the endoscope (2) and the 3D image data (3DA), in which the in vivo image is initially registered with the 3D image data (3DA) by a corresponding anatomical landmark and/or orientation. The tracking system (16) continuously detects the orientation and/or movement and/or orientation of the endoscope (2), and the control unit (12) generates, by means of the detected orientation and/or movement and/or orientation, an association representation (K) having both a representation of the in-vivo image (IA) and a representation of the view of the 3D image data (3DA), in which association representation the image data (3DA) is captured by the con