FDG-PET/CT in colorectal cancer: potential for vascular-metabolic imaging to provide markers of prognosis

  • Shih hsin Chen
  • , Kenneth Miles
  • , Stuart A. Taylor
  • , Balaji Ganeshan
  • , Manuel Rodriquez
  • , Francesco Fraioli
  • , Simon Wan
  • , Asim Afaq
  • , Robert Shortman
  • , Darren Walls
  • , Luke Hoy
  • , Raymond Endozo
  • , Aman Bhargava
  • , Matthew Hanson
  • , Joseph Huang
  • , Sherif Raouf
  • , Daren Francis
  • , Shahab Siddiqi
  • , Tan Arulampalam
  • , Bruce Sizer
  • Michael Machesney, Nicholas Reay-Jones, Sanjay Dindyal, Tony Ng, Ashley Groves*
*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Purpose: This study assesses the potential for vascular-metabolic imaging with FluoroDeoxyGlucose (FDG)–Positron Emission Tomography/Computed Tomography (PET/CT) perfusion to provide markers of prognosis specific to the site and stage of colorectal cancer. Methods: This prospective observational study comprised of participants with suspected colorectal cancer categorized as either (a) non-metastatic colon cancer (M0colon), (b) non-metastatic rectal cancer (M0rectum), or (c) metastatic colorectal cancer (M+). Combined FDG-PET/CT perfusion imaging was successfully performed in 286 participants (184 males, 102 females, age: 69.60 ± 10 years) deriving vascular and metabolic imaging parameters. Vascular and metabolic imaging parameters alone and in combination were investigated with respect to overall survival. Results: A vascular-metabolic signature that was significantly associated with poorer survival was identified for each patient group: M0colon – high Total Lesion Glycolysis (TLG) with increased Permeability Surface Area Product/Blood Flow (PS/BF), Hazard Ratio (HR) 3.472 (95% CI: 1.441–8.333), p = 0.006; M0rectum – high Metabolic Tumour Volume (MTV) with increased PS/BF, HR 4.567 (95% CI: 1.901–10.970), p = 0.001; M+ participants, high MTV with longer Time To Peak (TTP) enhancement, HR 2.421 (95% CI: 1.162–5.045), p = 0.018. In participants with stage 2 colon cancer as well as those with stage 3 rectal cancer, the vascular-metabolic signature could stratify the prognosis of these participants. Conclusion: Vascular and metabolic imaging using FDG-PET/CT can be used to synergise prognostic markers. The hazard ratios suggest that the technique may have clinical utility.

Original languageEnglish
Pages (from-to)371-384
Number of pages14
JournalEuropean Journal of Nuclear Medicine and Molecular Imaging
Volume49
Issue number1
Early online date10 Apr 2021
DOIs
Publication statusPublished - Dec 2021

Keywords

  • Colorectal cancer
  • CT perfusion
  • FDG-PET
  • Metabolism
  • Survival
  • Vascular

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