Molecular imaging and radioimmunoguided surgery

Area of Science:

• Molecular imaging
• Nuclear medicine
• Oncology

Background:

• Molecular imaging provides insights into cellular and tissue physiology.
• Radioimmunodetection, a modality within molecular imaging, utilizes radiolabeled monoclonal antibodies (mAbs) for tissue visualization.
• Two key techniques are immunoscintigraphy and radioimmunoguided surgery (RIGS).

Purpose of the Study:

• To describe immunoscintigraphy and RIGS as radioimmunodetection modalities.
• To highlight their potential in improving cancer localization.
• To discuss the efficacy, limitations, and future directions of RIGS.

Main Methods:

• Immunoscintigraphy employs external gamma cameras to detect radioactivity and generate images.
• Radioimmunoguided surgery (RIGS) uses intraoperative handheld gamma probes for real-time detection of occult disease foci.
• The article reviews existing studies on RIGS efficacy, particularly in colorectal cancer.

Main Results:

• Both immunoscintigraphy and RIGS show potential for enhanced preoperative and intraoperative cancer localization.
• RIGS has demonstrated good sensitivity in various malignancies, notably colorectal cancer.
• Concerns include a high false-positive rate and uncertainty regarding the clinical significance of residual RIGS-positive tissue.

Conclusions:

• Radioimmunodetection techniques, especially RIGS, offer promise in cancer diagnosis and surgical management.
• Further research is essential to refine RIGS, validate its findings, and clarify its impact on patient outcomes.
• Active surgeon involvement is crucial for advancing this technology and its clinical applications.