All cases were either performed by the consultant surgeon or by a trainee under direct supervision of the surgeon. All cases were carried out by an open technique, and there was no change in surgical technique during the study period. Individual pathology reports were retrieved from the hospital pathology database and reviewed. Patients were identified from prospectively collected databases at the two centres. In unit one 110 cases were carried out between October 2002 and July 2005 and 103 cases in unit two between August 2005 and October 2009. The study population consisted of 213 patients undergoing consecutive potentially curative CRC resection for adenocarcinoma, operated on by a single consultant surgeon, in two units, over a seven-year period. The aim of this study was therefore to compare the LN harvest and factors influencing it in patients undergoing CRC resection by a single surgeon, in separate units, following relocation of the surgeon during the series. It is not clear, however, whether the interunit variability previously observed is due to variations in patient characteristics, surgical technique, or pathological technique. There is also interunit variability in the harvesting of LNs following CRC resection. LN retrieval is dependent on variables that relate to patient characteristics, the operation, and the techniques of both the operating surgeon and reporting pathologist. National agencies and professional associations in the UK and USA have recommended that a minimum of 12 nodes/patient should be examined, with all units being expected to achieve this level consistently. LN harvest is increasingly being suggested as a surrogate marker of surgical quality in the treatment of CRC. Inaccurate staging may also have an adverse effect on survival statistics for both node negative and node positive cases. Failure to identify nodal metastases that exist may deprive the patient of adjuvant therapy and misinform them of their prognosis. Examination of too few lymph nodes risks under staging a patient's disease. The identification of lymph node (LN) metastases following colorectal cancer (CRC) resection is one of the critical discriminators that influence the decision to use adjuvant therapy. This has implications for nodal harvest as a surrogate marker of surgical quality. Both units comply with national standards, but the “surgeon's results” at the two units appear to be pathologist dependent. A surgeon moving units can experience significantly different LN yield following CRC resection. 007) as independent predictors of harvest. Multivariate analysis identified unit ( P <. In unit one 42% of cases were LN positive and in unit two 48% ( P =. Median LN harvests were significantly different between the two centres: unit 1: 13 nodes/patient and unit 2: 22 nodes/patient ( P <. The study population was 213 consecutive patients undergoing CRC resection by a single surgeon, at two units: unit one 110 operations (2002–2005) and unit two 103 (2005–2009). The aim of this study was to examine the effect of surgeon relocation on lymph node (LN) retrieval in colorectal cancer (CRC) resection.
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