Tumor Invasion of Lymph Node Capsules in Patients with Dukes C Colorectal Adenocarcinoma |
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Authors: | Hideaki Yano MD PhD Yukio Saito MD PhD Yujiro Kirihara MD Junya Takashima MD |
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Institution: | (1) Department of Surgery, International Medical Center of Japan, 1-21-1, Toyama, Shinjuku-ku, Tokyo 162-8655, Japan |
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Abstract: | Purpose The objective of this study was to investigate the correlation between the microscopic findings of positive lymph nodes, especially
focusing on capsular invasion, and the outcome after curative surgical resection of colorectal cancer.
Methods We analyzed 480 positive lymph nodes from 155 consecutive patients with Stage III colorectal cancer to determine the frequency
and significance of lymph node capsular invasion. Recurrence-free and cancer-specific survival rates were assessed in the
patients with and without lymph node capsular invasion.
Results Between April 1995 and December 2000, 406 consecutive patients with primary colorectal cancer underwent curative resection.
Regional lymph node metastases were present in 155 cases (38.2 percent). During the median follow-up period of 4.8 years,
41 patients (26.5 percent) developed recurrent disease and 28 patients died of cancer. Lymph node capsular invasion was detected
in one or more lymph nodes from 75 cases (48.3 percent). The five-year recurrence-free rate was 56.1 percent in this group,
whereas in the 80 patients without lymph node capsular invasion the rate was 88 percent (P<0.01). Features that were associated with recurrent disease were greater number of positive lymph nodes, venous invasion
in primary tumor, infiltrative growth pattern of intranodal tumor, and presence of lymph node capsular invasion. Multivariate
analysis identified lymph node capsular invasion as the only significant prognostic factor for recurrence. In multivariate
analysis with regard to survival, lymph node capsular invasion, venous invasion, and number of positive nodes remained as
significant prognostic factors.
Conclusions Lymph node capsular invasion, determined by routine hematoxylin-eosin staining, is a potent prognostic factor in Stage III
colorectal cancer.
Read in part at the meeting of The International Society of University Colon and Rectal Surgeons, Budapest, Hungary, June
9, 2004.
Reprints are not available. |
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Keywords: | Lymph node capsule Lymph node metastasis Colorectal neoplasm |
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