Variation in lymph node evaluation in rectal cancer: a Dutch nationwide population-based study
M A G Elferink1, S Siesling, V E P P Lemmens
1Department of Research, Comprehensive Cancer Center North East, Groningen, The Netherlands. m.elferink@ikno.nl
Annals of Surgical Oncology
|August 25, 2010
Summary
Evaluating more lymph nodes (LNs) in rectal cancer patients improves prognosis estimation. Factors like patient demographics and tumor characteristics influence LN evaluation, but significant variation persists between pathology labs and hospitals.
Area of Science:
- Oncology
- Pathology
- Surgical Oncology
Background:
- Accurate staging and prognosis estimation in rectal cancer rely on evaluating a sufficient number of lymph nodes (LNs).
- Significant variation exists in the number of LNs evaluated, impacting patient care.
Purpose of the Study:
- To identify factors associated with adequate lymph node evaluation in rectal cancer patients.
- To determine the relationship between the number of evaluated LNs and patient survival.
Main Methods:
- Retrieved data from 10,788 patients with stage I-III rectal carcinoma (2000-2006) from the Netherlands Cancer Registry.
- Utilized multilevel logistic analysis to identify factors influencing LN evaluation.
- Employed Kaplan-Meier and Cox regression analyses to assess survival associations.
Main Results:
- Median evaluated LNs was 7, with a range of 4-11 across pathology laboratories.
- Factors such as male sex, younger age, deeper tumor invasion, nodal involvement, specific surgical procedures, and academic pathology review were linked to higher LN counts (≥12).
- Overall survival increased with a greater number of evaluated LNs, though unexplained variations between institutions remained.
Conclusions:
- Substantial variation in lymph node evaluation necessitates improvements in hospital and laboratory practices.
- Enhanced lymph node evaluation can lead to more accurate staging and prognosis for rectal cancer patients.
