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Serrated polyposis syndrome may go undiagnosed even in structured colorectal cancer screening programmes performed by endoscopists with otherwise good quality indices
  1. Christoph Schramm1,
  2. Katharina Janhsen2,
  3. Münevver Demir1,
  4. Dirk Nierhoff1,
  5. Tobias Goeser1,
  6. Hans Michael Steffen1
  1. 1Department of Gastroenterology and Hepatology, University Hospital Cologne, Cologne, North Rhine-Westphalia, Germany
  2. 2Department of Gastroenterology, St. Katharinen Hospital, Frechen, North Rhine-Westphalia, Germany
  1. Correspondence to Dr Christoph Schramm, Department of Gastroenterology and Hepatology, University Hospital Cologne 50937,North Rhine-Westphalia, Germany; christoph.schramm{at}uk-koeln.de

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We have read the article by Ijspeert et al with great interest as it comprises the largest series of colonoscopies concerning the serrated polyposis syndrome (SPS) published so far.1 SPS is characterised by multiple serrated polyps (SP) throughout the colon and it is associated with an increased risk of colorectal cancer (CRC).2 A 5-year cumulative incidence of CRC during surveillance after clearing of all relevant polyps of 1.5% has been reported.2 Recently published guidelines recommend resection of all clinically relevant lesions and starting annual colonoscopy surveillance thereafter.3 Therefore, early recognition and treatment of SPS is important to achieve low long-term risk of CRC.4

We retrospectively analysed 4161 primary screening colonoscopies of average-risk individuals aged ≥50 years performed by 15 different experienced gastroenterologists (≥300 colonoscopies of all indications per year during the …

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