Article Text

[18F]FDG PET/CT imaging of colorectal cancer: a pictorial review
  1. Fahmid U Chowdhury1,2,
  2. Nehal Shah1,
  3. Andrew F Scarsbrook1,2,
  4. Kevin M Bradley3
  1. 1Department of Radiology, Leeds Teaching Hospitals, Leeds, UK
  2. 2Department of Nuclear Medicine, Leeds Teaching Hospitals, Leeds, UK
  3. 3Departments of Radiology and Nuclear Medicine, Oxford Radcliffe Hospitals, Oxford, UK
  1. Correspondence to Dr Fahmid U Chowdhury, Departments of Nuclear Medicine and Radiology, Bexley Wing Level 1, St James's University Hospital, Beckett Street, Leeds LS7 9TF, UK; fahmid.chowdhury{at}


Integrated positron emission tomography/CT (PET/CT) with 2-[18F]fluoro-2-deoxy-d-glucose (FDG) is a hybrid imaging modality which has recently become established in the staging, restaging and therapy response assessment of oncology patients. FDG PET/CT has several recognised applications in colorectal cancer (CRC) imaging including preoperative evaluation of apparently limited metastatic disease, detection of disease recurrence, clarification of equivocal lesions at initial staging, investigation of unexplained rising tumour markers, and incidental detection of occult primary colonic tumours. With a constantly advancing body of evidence and increasing availability, applications of PET/CT in CRC are likely to emerge in therapy response assessment, radiotherapy planning, use of novel tracers and ‘one-stop’ imaging techniques such as iodinated contrast-enhanced PET/CT. With the use of illustrative clinical examples, this article reviews the utility of FDG PET/CT in the management of CRC, discussing its role and limitations in the multimodality imaging of these patients.

  • Colorectal cancer
  • CRC
  • fluorodeoxyglucose
  • FDG
  • positron emission tomography
  • PET/CT
  • nuclear medicine
  • adult oncology
  • gastrointestinal tumours
  • molecular aspects

Statistics from


  • Competing interests None declared.

  • Provenance and peer review Commissioned; externally peer reviewed.

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.