Lugli, Alessandro; Hädrich, Marion; Inderbitzin, D; Borner, Markus; Zlobec, Inti (2012). Intratumoral budding is preoperative biopsies predicts local and distant metastasis in colorectal cancer patients. Virchows Archiv, 461(1 (Sup), S11. Springer
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Objective:
In 2011, the term “intratumoral budding, ITB” was used to describe the presence of tumor buds within the main tumor body and was correlated to worse clinical outcome in colorectal cancer patients. Here, we further elucidate the potential clinical role of ITB in pre-operative biopsies using pan-cytokeratin stained tissues and a quantitative scoring system.
Method:
139 pre-operative biopsies from patients with colorectal cancer underwent immunohistochemistry for pancytokeratin (AE1/AE3). ITB were counted in the area of densest budding (40×) and classified as high-grade when >10 buds/HPF were observed based on receiver operating characteristic (ROC) curve analysis.
Results:
High-grade ITB occurred in 26.6 % of cases and was associated with right-sided tumor location (p=0.0356), more advanced pT (p=0.0198) and pN (p<0.0001) classifications, distant metastasis (p=0.0164), higher tumor grade (p=0.0037) and lymphatic invasion (p=0.0445). The specificity and positive predictive value for lymph node metastasis was 86.7 % and 75.6 %, respectively. Disease-free survival was significantly worse in patients with high-grade ITB (5-year survival=25 %) in comparison to patients with low-grade ITB (5-year survival=55 %) (p=0.0157).
Conclusion:
The assessment of ITB in pre-operative biopsies is predictive of local and distant metastasis in corresponding resections and should be considered in daily management of colorectal cancer patients.
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