As a team they provide interdisciplinary counseling and perform joint operations together with the other departments. The range of conditions Drs. Zwiesigk and Freitag treat include:

  • Intestinal disorders (e.g. sigma diverticulosis, obstipation)
  • Colorectal ailments including polyps, rectal prolapse, tumors, anal fistula, abscesses, fissures and eczema, hemorrhoids
  • General surgical needs such as gallstones, hernias and growths

Both colleagues are particularly known for their very gentle, low-pain examinations – both diagnostic as well as preventative (proctocolonoscopy, rectoscopy). Drs. Zwiesigk and Freitag are assisted in their duties by Dr. med. Roland Scherer and Dr. med. Thorsten Unglaube from Berlin’s Waldfriede Hospital.



Prof. Dr. med. habil. Frank Marusch, FACS
Facharzt für Chirurgie
Facharzt für Visceralchirurgie
Spezielle Visceralchirurgie und Proktologie
Klinik für Allgemein- und Visceralchirurgie
Klinikum Ernst von Bergmann

Not nearly as bad as I
feared – the number one comment from my patients.

Dr. med. Per Zwiesigk
Surgeon; Specializations: Visceral Surgery, Coloproctology

Our surgeon is a competitive athlete – an enthusiastic champion swimmer – and brings just as much drive to our team.