NCT00625625

Lymphatic Mapping, Sentinel Lymph Node Analysis, and Blood Tests in Detecting and Predicting Early Micrometastases in Patients With Colorectal Cancer

Ultrastaging of Early Cancer of the Large Bowel Using Intraoperative Lymphatic Mapping, Sentinel Node Analysis and Blood Testing

• Status: Unknown
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 225 (estimated)
• Sponsor: Saint John's Cancer Institute · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

RATIONALE: Diagnostic procedures, such as lymph node mapping during surgery and sentinel lymph node biopsy, may help doctors find micrometastases and predict cancer recurrence. PURPOSE: This phase II trial is studying how well lymph node mapping during surgery together with sentinel lymph node analysis and blood testing work in detecting and predicting early micrometastases in patients with colorectal cancer.

Detailed description

OBJECTIVES: * To determine the accuracy and sensitivity of intraoperative lymph node mapping with isosulfan blue and sentinal node biopsy (SLN) in patients with colorectal cancer (CRC). * To compare molecular and immunohistochemical methods for detection of micrometastases in the SLN and primary tumor and evaluate the clinical outcome. * To evaluate the clinicopathological utility of hematogenous micrometastases in predicting disease recurrence in CRC. OUTLINE: Patients receive isosulfan blue subserosally around the primary tumor for sentinel lymph node (SLN) identification and SLN(s) are marked. Patients undergo a standard colon resection as planned to include the SLN(s) and regional lymph nodes. Lymph nodes removed during surgery are analyzed within 30 days after surgery. Routine pathologic analysis (H\&E) are performed on all lymph nodes (SLN and non-SLN) removed. Immunohistochemical (IHC) staining for cytokeratin antibodies AE-1/AE-3 or MAK-6 are performed on all lymph nodes negative by H\&E. Multimarker PCR (MM PCR) are performed on all SLNs. Blood samples are collected at baseline and then periodically for 4 years for MM PCR to detect circulating tumor cells and standard tumor markers (e.g., CEA). After surgery, patients are followed every 6 months for 4 years.

Conditions

• Colorectal Cancer

Interventions

Type	Name	Description
DRUG	isosulfan blue
GENETIC	polymerase chain reaction
OTHER	diagnostic laboratory biomarker analysis
OTHER	immunohistochemistry staining method
PROCEDURE	diagnostic lymphadenectomy
PROCEDURE	therapeutic conventional surgery
PROCEDURE	therapeutic lymphadenectomy

Timeline

• Start date: 2004-03-01
• Primary completion: 2007-11-01
• First posted: 2008-02-28
• Last updated: 2013-09-17