Appropriate timing of surveillance intervals with whole-body 18F-FDG PET/CT following treatment for sinonasal malignancies

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Abstract

PURPOSE: To assess the ideal timing of posttreatment whole-body 18F-FDG PET/CT examination as routine surveillance to determine local recurrence (R), lymph node metastasis (LM), and distant metastasis (DM) of sinonasal malignancies and to investigate the effect of 18F-FDG PET/CT on survival.

METHODS: An overall 80 patients who had undergone a total of 197 posttreatment whole-body 18F-FDG PET/CT examinations for sinonasal malignancy were retrospectively examined after institutional review board approval. Patients were grouped regarding the time intervals (<1 month, 1-3 months, 3-6 months, 6-12 months, 12-18 months and >18 months) after the conclusion of treatment. Differences in diagnostic accuracy due to different follow-up intervals were calculated by receiver operator curves (ROC) and a Cox proportional hazards model was used to assess the prognostic value of surveillance 18F-FDG PET/CT.

RESULTS: Considering the time intervals of posttreatment 18F-FDG PET/CT scans, the negative predictive value and positive predictive value of the 18F-FDG PET/CT examinations to predict overall recurrence in 1-3 months (100 and 100%, respectively) and >18 months (100 and 95%, respectively) were higher than for recurrence detection in <1 month (50 and 100%, respectively), 3-6 months (81 and 93%, respectively), 6-12 months (79 and 87%, respectively), and 12-18 months (75 and 80%, respectively) (p < 0.05). Positive findings on 18F-FDG PET/CT scans were also independent predictors of poorer overall survival (OS) (p < 0.05).

CONCLUSIONS: Whole-body 18F-FDG PET/CT is capable of identifying recurrences following treatment, using an optimal time interval for scanning of 1-3 months and >18 months after therapy.

Original languageEnglish (US)
Pages (from-to)75-80
Number of pages6
JournalEuropean Journal of Radiology
Volume118
DOIs
StatePublished - Sep 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • F-FDG PET/CT
  • Follow-up
  • Sinonasal malignancies
  • Surveillance
  • Timing
  • Prognosis
  • Humans
  • Middle Aged
  • Whole Body Imaging/methods
  • Male
  • Time Factors
  • Aged, 80 and over
  • Adult
  • Female
  • Retrospective Studies
  • Positron Emission Tomography Computed Tomography/methods
  • Radiopharmaceuticals
  • Neoplasm Recurrence, Local/diagnostic imaging
  • Proportional Hazards Models
  • Lymphatic Metastasis
  • Paranasal Sinus Neoplasms/diagnostic imaging
  • Lymphography/methods
  • Fluorodeoxyglucose F18
  • Aged
  • Nose Neoplasms/diagnostic imaging

PubMed: MeSH publication types

  • Journal Article
  • Evaluation Study

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