Erschienen in:
01.02.2011 | Original Article—Alimentary Tract
Characteristics of recurrence after curative resection for T1 colorectal cancer: Japanese multicenter study
verfasst von:
Hirotoshi Kobayashi, Hidetaka Mochizuki, Takayuki Morita, Kenjiro Kotake, Tatsuo Teramoto, Shingo Kameoka, Yukio Saito, Keiichi Takahashi, Kazuo Hase, Masatoshi Oya, Koutarou Maeda, Takashi Hirai, Masao Kameyama, Kazuo Shirouzu, Kenichi Sugihara
Erschienen in:
Journal of Gastroenterology
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Ausgabe 2/2011
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Abstract
Background
Because the rate of recurrence after curative resection for T1 colorectal cancer is low, the characteristics of recurrence remain obscure. This multicenter study attempted to clarify the characteristics of recurrence after curative resection for T1 colorectal cancer.
Methods
We analyzed the associations between recurrence and various clinicopathological features in 798 patients who had undergone curative resection alone for T1 colorectal cancer at 14 hospitals between 1991 and 1996.
Results
The rate of lymph node metastasis (LNM) in patients with T1 colorectal cancer was 10.5% (84/798), and 18 (2.3%) of the 798 patients developed recurrence during the median follow-up of 7.8 years. The recurrence rates in patients with colon cancer with and without LNM were 3.6 and 1.3%, respectively (p = 0.19). These rates in patients with cancer of the rectum were 25.0 and 1.1% (p < 0.0001). Among various parameters, histological grade (p < 0.0001), location (p = 0.025), LNM (p < 0.0001), and venous invasion (p = 0.0013) were risk factors for recurrence. Among them, LNM (p = 0.0008) and histological grade (p = 0.041) were independent risk factors for recurrence after curative resection for T1 colorectal cancer. Time to recurrence was more likely to be shorter for patients with, than without nodal involvement. In patients with an unfavorable histological grade, all recurrences developed within 1 year.
Conclusions
The recurrence rate after curative resection for node-negative T1 colorectal cancer was very low. The effectiveness of surveillance to detect recurrence after curative resection for T1 colorectal cancer should be validated in further studies.