Multi-Tracer Imaging Evaluated for Cancer Surgery
Researchers tested a dual-tracer method to improve the detection of colorectal liver metastases during surgery.
Updated on Sept. 22, 2026 in Cancer
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A study of ten patients evaluated the feasibility of using multiwavelength fluorescence imaging to improve tumor detection during colorectal liver metastases surgery. The process combined indocyanine green and the tracer SGM-101 to enhance surgical precision.
Why it matters
Multiwavelength imaging aims to overcome the limited tumor specificity of traditional indocyanine green, which could lead to more accurate resection of cancerous tissue. The technique provides a potential way to better differentiate between healthy and malignant margins during operations.
The study involved 10 patients who received 0.5 mg/kg of indocyanine green and 10 mg of SGM-101. While SGM-101 achieved 100% specificity, it reached 70% patient-level sensitivity, falling below the 80% success benchmark.
The players
SGM-101
This is a fluorescent tracer designed to bind specifically to tumor cells to assist surgeons in identifying malignant tissues.
Indocyanine green
This is a fluorescent dye commonly used in medical imaging to visualize blood flow and tissue structures during surgical procedures.
The details
The procedure observed no spectral interference between the two tracers, allowing surgeons to identify all R1 margins during the surgery. Sensitivity for SGM-101 reached 90% in lesions specifically characterized by high tumor cell density.
Timeline
Patients received indocyanine green 7 days before surgery.
Patients received SGM-101 4 days before surgery.
The Big Picture
This study follows a pattern set by the development of fluorescence-guided surgery (FGS) to improve surgical oncological outcomes. By testing new multiwavelength techniques, researchers seek to refine current intraoperative visualization standards for better cancer margin control.
This imaging method aims to improve the precision of cancer surgeries, potentially reducing the need for repeat procedures by identifying tumor margins more clearly. Increased surgical accuracy may lead to better long-term outcomes for patients with colorectal liver metastases.
The takeaway
These initial findings suggest that while multiwavelength imaging shows promise for precise margin discrimination, further development is required to improve sensitivity. Future clinical trials will determine if this dual-tracer approach can become a standard tool in operating rooms.
Further reading
Learn more about the latest innovations in Cancer care and detection.
Source note: This article includes information reported by Nature.
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