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Related Experiment Videos

Grading liposarcomas with PET using [18F]FDG.

L P Adler1, H F Blair, R P Williams

  • 1Department of Radiology, University Hospitals of Cleveland, OH 44106.

Journal of Computer Assisted Tomography
|November 1, 1990
PubMed
Summary
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Positron emission tomography (PET) with [18F]2-deoxy-2-fluoroglucose (FDG) can differentiate liposarcoma grades. High-grade liposarcomas show higher FDG uptake than low-grade tumors, aiding diagnosis.

Area of Science:

  • Oncology
  • Nuclear Medicine
  • Radiology

Background:

  • Liposarcomas are soft tissue sarcomas with varying grades of malignancy.
  • Accurate grading is crucial for treatment planning and prognosis.
  • Distinguishing between low-grade and high-grade liposarcomas can be challenging with conventional imaging.

Purpose of the Study:

  • To evaluate the utility of [18F]2-deoxy-2-fluoroglucose positron emission tomography (FDG-PET) in differentiating low-grade from high-grade liposarcomas.
  • To assess the correlation between FDG uptake and histological tumor grade.

Main Methods:

  • Five patients with thigh liposarcomas underwent FDG-PET imaging.
  • Tumors were histologically classified into low-grade (Grade 1 myxoid) and high-grade (Grades 2 and 3 pleomorphic) liposarcomas.

Related Experiment Videos

  • Average dose uptake ratio (DUR) of FDG was calculated for each tumor.
  • Statistical analysis was performed to compare DUR between groups and correlate with histological grade.

    • Main Results:

    • Low-grade liposarcomas showed an average DUR of 1.38.
    • High-grade liposarcomas demonstrated higher FDG avidity with a mean DUR of 2.45.
    • A significant difference in DUR was observed between low-grade and high-grade liposarcomas (p = 0.004).
    • Histological grade strongly correlated with FDG DUR (Rho = 0.89).

    Conclusions:

    • FDG-PET imaging shows promise in distinguishing between low-grade and high-grade liposarcomas.
    • Increased FDG uptake is associated with higher histological malignancy grade in liposarcomas.
    • FDG-PET may serve as a valuable tool for non-invasive tumor grading and management of liposarcoma.