Depth of invasion had an effect on survival, which was worse once the muscle coat had been breached (933 versus 1,150 days). Large tumours tended to have a worse prognosis although this again failed to reach statistical significance.
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Squamous carcinoma of the oesophagus: histological criteria and their prognostic significance.
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The sentences
The number of tumour positive nodes failed to predict survival. Many of the features given below showed a trend in survival although failing to reach statistical significance (Table I).