A protocol for performing extended lymph node dissection using primary tumor pathological features for patients treated with radical nephrectomy for clear cell renal cell carcinoma

The Journal of Urology
Michael L BluteHorst Zincke

Abstract

We determined the primary pathological features of clear cell renal cell carcinoma that are predictive of positive regional lymph nodes at radical nephrectomy (RN) and developed a protocol for the selective use of extended lymph node dissection. We studied 1,652 patients who underwent RN for unilateral pM0 sporadic clear cell renal cell carcinoma between 1970 and 2000. A multivariate logistic regression model was used to determine the pathological features of the primary tumor that were associated with positive regional lymph nodes at RN. There were 887 (54%) patients with no positive nodes (pN0), 57 (3%) with 1 positive node (pN1), 11 (1%) with 2 or more positive nodes (pN2) and 697 (42%) who did not have any lymph nodes dissected (pNx). Nuclear grade 3 or 4 (p <0.001), presence of a sarcomatoid component (p <0.001), tumor size 10 cm or greater (p = 0.005), tumor stage pT3 or pT4 (p = 0.017) and histological tumor necrosis (p = 0.051) were significantly associated with positive regional lymph nodes in a multivariate setting. These features can be used to identify candidates for extended lymph node dissection at the time of RN. For example, only 6 (0.6%) of the 1,031 patients with 0 or 1 of these features had positive lymph nod...Continue Reading

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