Tumour perforation In pT4 tumours those with perforation through the tumour had a worse survival (26.4%: 95% CI 19.9–33.2%) than those with no perforation (32.3%: 95% CI 26.0–38.9%) although this did not reach statistical significance due to low reporting rates of just 25.8% of this factor in pT4 tumours.
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The validity of the Royal College of Pathologists' colorectal cancer minimum dataset within a population.
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