TEM is a recognised, minimally invasive operative technique for clear view resection of tumours in the rectum [4, 5]. Rigid rectoscopy is one of the oldest techniques in endoscopy of the intestinal tract. New techniques were developed with more advanced optics in the beginning of the last century . Inter-ventional procedures through rigid rectoscopes under gas dilatation had been limited to simple procedures such as snare resections. Operative rectosco-pes were developed with diameters up to 4 cm, but were used only as mechanical retractors and conventional instruments were applied for minor surgical procedures inside the rectal cavity.
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