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Physiological Activity of Spinal Cord in Children: An 18F-FDG PET-CT Study

Silvia Taralli1, Lucia Leccisotti, Maria Vittoria Mattoli

  • 1*Institute of Nuclear Medicine and †Institute of Public Health, Università Cattolica del Sacro Cuore, Rome, Italy.

Spine
|March 25, 2015
PubMed

Insights

This study found that F-Fluoro-deoxy-glucose (F-FDG) spinal cord uptake in children increases with age and is influenced by weight and sex. Understanding normal F-FDG metabolism is crucial for accurate PET-CT interpretation in pediatric oncology.

Area of Science:

  • Nuclear Medicine
  • Pediatric Imaging
  • Neuroscience

Background:

  • F-Fluoro-deoxy-glucose (F-FDG) uptake in the pediatric spinal cord exhibits variability.
  • Accurate interpretation of F-FDG Positron Emission Tomography-Computed Tomography (PET-CT) scans requires understanding normal spinal cord metabolism in children.
  • Distinguishing physiological F-FDG uptake from pathological findings is essential for accurate diagnosis.

Purpose of the Study:

  • To evaluate the F-Fluoro-deoxy-glucose (F-FDG) metabolic activity of the normal spinal cord in a pediatric population.
  • To assess correlations between F-FDG uptake and demographic, clinical, and environmental variables in children.
  • To establish reference ranges for normal spinal cord F-FDG metabolism in pediatric patients.

Main Methods:

  • Retrospective analysis of F-FDG PET-CT scans from 167 pediatric patients (age 3.9-18.9 years).
  • Exclusion of patients with prior therapeutic procedures or central nervous system diseases.
  • Measurement of maximum standardized uptake value (SUVmax) in three spinal cord levels (C1-C7, D1-D6, D7-L1) and statistical correlation analysis.

Main Results:

  • Median SUVmax was significantly higher in cervical (C1-C7) and thoracolumbar (D7-L1) levels compared to the thoracic (D1-D6) level.
  • Spinal cord F-FDG uptake (SUVmax) significantly increased with age across all levels.
  • Positive associations were found between SUVmax and body weight, female sex, and Hodgkin lymphoma; only weight and female sex remained significant in multivariate analysis.

Conclusions:

  • Normal F-FDG spinal cord metabolic activity in children is age-dependent and influenced by weight and sex.
  • This knowledge is critical for accurate interpretation of PET-CT scans in pediatric patients, particularly those with oncologic conditions.
  • Understanding physiological F-FDG uptake helps prevent misinterpretation of scans and potential diagnostic errors.
Abstract

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