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Table 2 Detection advanced CRC on abdominal CT

From: The strengths and limitations of routine staging before treatment with abdominal CT in colorectal cancer

Analysis of surgical patients that were staged before treatment (n = 463)
    Diagnosed Suspected Not seen
Liver metastases n = 86 73 85% 12 14% 1 1%
Peritoneal carcinomatosis n = 33 11 33% 6 18% 16 48%
pT4 colon carcinomaa n = 115 99 86% 5 4% 11 10%
  Rectum (n = 115) Colon (n = 348)
  cM pM cM pM
  n % n % n % n %
Liver metastases 13 11% 16 14% 61 18% 70 20%
Peritoneal carcinomatosis 2 2% 3 3% 9 3% 30 9%
Locally advanced disease n.a.b n.a. 99 29% 123 36%
  1. cM: metastases diagnosed before treatment on staging abdominal CT (without additional diagnostics)
  2. pM: final conclusion, including additional imaging, peroperative findings and histology
  3. a In 8 patients the local invasiness was not described in the original report, leaving 115 patients for evaluation
  4. b Local invasiveness and lymph node status (cTN stage) in rectal carcinoma was determined on pelvic MRI