Prospective comparative study of MRI including diffusion-weighted images versus FDG PET-CT for the detection of recurrent head and neck squamous cell carcinomas after (chemo)radiotherapy

Eur J Radiol. 2019 Feb:111:62-67. doi: 10.1016/j.ejrad.2018.12.004. Epub 2018 Dec 5.

Abstract

Objective: This prospective study aims to test if MRI including diffusion weighted images can replace FDG PET-CT in the diagnosis of patients with suspicion of local recurrent head and neck squamous cell carcinomas after (chemo)radiation.

Methods: Seventy-five patients suspected of local recurrence underwent a MRI and a FDG PET-CT. Qualitative assessment of the images was performed. Reference standard was the results of biopsy or the absence of a recurrence during follow up.

Results: Seventy patients were included. Fifty percent had local recurrence. FDG PET-CT had accuracy of 71% compared to 73% for MRI. The sensitivity and specificity were 97% compared to 69% and 46% compared to 77% for FDG PET-CT and MRI respectively.

Conclusions: MRI showed similar diagnostic accuracy, superior specificity but inferior sensitivity compared to FDG PET-CT. Based on current results, we consider MRI including diffusion weighted sequences unable to replace FDG PET-CT as a single imaging modality when local recurrent disease of HNSCC after (C)RT is suspected.

Keywords: Chemoradiotherapy; Diffusion magnetic resonance imaging; Head and neck neoplasms; Neoplasm recurrence; Positron emission tomography computed tomography.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Chemoradiotherapy
  • Diffusion Magnetic Resonance Imaging* / methods
  • Female
  • Fluorodeoxyglucose F18
  • Humans
  • Male
  • Middle Aged
  • Neoplasm Recurrence, Local / diagnostic imaging*
  • Neoplasm Recurrence, Local / pathology
  • Positron Emission Tomography Computed Tomography* / methods
  • Prospective Studies
  • Squamous Cell Carcinoma of Head and Neck / diagnostic imaging
  • Squamous Cell Carcinoma of Head and Neck / pathology*
  • Squamous Cell Carcinoma of Head and Neck / therapy

Substances

  • Fluorodeoxyglucose F18