Abstract | CONTEXT: OBJECTIVE: DESIGN, SETTING, AND PARTICIPANTS: Prospective study of 257 patients with pN0 colorectal cancer enrolled between March 2002 and June 2007 at 9 US and Canadian centers (7 academic medical centers and 2 community hospitals) provided 2570 fresh lymph nodes measuring 5 mm or larger for histopathology and GUCY2C messenger RNA analysis. Patients were followed up for a median of 24 months (range, 2-63 months) for disease recurrence or death. MAIN OUTCOME MEASURES: Time to recurrence (primary outcome) and disease-free survival (secondary outcome) relative to expression of GUCY2C in lymph nodes. RESULTS: Thirty-two patients (12.5%) had lymph nodes negative for GUCY2C (pN0 [mol-]), and all but 2 remained free of disease during follow-up (recurrence rate, 6.3%; 95% confidence interval [CI], 0.8%-20.8%). Conversely, 225 patients (87.5%) had lymph nodes positive for GUCY2C (pN0 [mol+]), and 47 developed recurrent disease (20.9%; 95% CI, 15.8%-26.8%) (P = .006). Multivariate analyses revealed that GUCY2C in lymph nodes was an independent marker of prognosis. Patients who were pN0 (mol+) exhibited earlier time to recurrence (adjusted hazard ratio, 4.66; 95% CI, 1.11-19.57; P = .04) and reduced disease-free survival (adjusted hazard ratio, 3.27; 95% CI, 1.15-9.29; P = .03). CONCLUSION: Expression of GUCY2C in histologically negative lymph nodes appears to be independently associated with time to recurrence and disease-free survival in patients with pN0 colorectal cancer.
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Authors | Scott A Waldman, Terry Hyslop, Stephanie Schulz, Alan Barkun, Karl Nielsen, Janis Haaf, Christine Bonaccorso, Yanyan Li, David S Weinberg |
Journal | JAMA
(JAMA)
Vol. 301
Issue 7
Pg. 745-52
(Feb 18 2009)
ISSN: 1538-3598 [Electronic] United States |
PMID | 19224751
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Chemical References |
- Biomarkers, Tumor
- RNA, Messenger
- Receptors, Peptide
- GUCY2C protein, human
- Guanylate Cyclase
- Receptors, Enterotoxin
- Receptors, Guanylate Cyclase-Coupled
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Topics |
- Aged
- Biomarkers, Tumor
(analysis, metabolism)
- Colorectal Neoplasms
(enzymology)
- Disease-Free Survival
- Female
- Guanylate Cyclase
(analysis, genetics, metabolism)
- Humans
- Lymph Nodes
(enzymology)
- Lymphatic Metastasis
(diagnosis)
- Male
- Middle Aged
- Neoplasm Recurrence, Local
- Neoplasm Staging
- Observation
- Prognosis
- Proportional Hazards Models
- Prospective Studies
- RNA, Messenger
(analysis)
- Receptors, Enterotoxin
- Receptors, Guanylate Cyclase-Coupled
- Receptors, Peptide
(analysis, genetics, metabolism)
- Reverse Transcriptase Polymerase Chain Reaction
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