Applications of [18F]fluorodeoxyglucose PET Imaging in Colorectal Cancer

Area of Science:

• Oncology
• Radiology
• Nuclear Medicine

Background:

• Accurate staging of colorectal cancer is essential for guiding treatment.
• Computed tomography (CT) and MR imaging are primary methods for anatomical evaluation.
• Functional imaging complements anatomical assessment in cancer management.

Purpose of the Study:

• To evaluate the role of [¹⁸F]fluorodeoxyglucose (FDG) PET/CT in colorectal cancer staging and management.
• To highlight the utility of FDG PET/CT in specific clinical scenarios.
• To discuss the potential of emerging molecular imaging tracers.

Main Methods:

• Review of current imaging modalities for colorectal cancer.
• Analysis of the application of FDG PET/CT in staging, recurrence detection, and treatment response assessment.
• Discussion of novel molecular imaging agents.

Main Results:

• CT and MR imaging provide essential anatomic details for colorectal cancer staging.
• [¹⁸F]fluorodeoxyglucose (FDG) PET/CT offers crucial functional and morphological information.
• FDG PET/CT is particularly valuable for detecting recurrence with rising carcinoembryonic antigen and equivocal conventional imaging, assessing treatment response, and providing prognostic data.

Conclusions:

• FDG PET/CT plays a significant role in colorectal cancer management beyond initial staging.
• Its ability to detect recurrence and assess treatment response is clinically important.
• Future advancements in molecular imaging promise to further enhance its utility.