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18FDG-PET applications for cartilage neoplasms
Frieda Feldman1, Ronald Van Heertum, Chitra Saxena
1Department of Radiology, New York Presbyterian Medical Center, 622 W. 168 Street, New York, NY 10032, USA. ff2@columbia.edu
Objective:
To assess the value of [18F]fluoro-2-deoxy-D-glucose positron emission tomography (18FDG-PET) in defining aggressive cartilage neoplasms, particularly those with problematic or borderline histologic, imaging and clinical characteristics.
Design And Patients:
From 2000 to 2003, 29 cartilage lesions were studied with whole-body 18FDG-PET scans (Siemens Ecat Exact, Knoxville, Tenn.). Analyses of data in 20 females and nine males, 11-85 years old, were based on maximum standard uptake values (SUVs) in regions of interest (ROIs) on axial 3.37 mm thick, 3x3 pixel images. A statistically significant maximum SUV cutoff of 2.0 was used to distinguish benign from malignant cartilage neoplasms and correlated with the postoperative histopathologic findings.
Results:
In 26 operated cases the overall sensitivity of whole-body 18FDG-PET in separating benign and malignant lesions was 90.9% (10/11), specificity 100% (18/18) and accuracy 96.6%.
Conclusions:
Whole-body 18FDG-PET is a valuable adjunct in identifying primary, recurrent and metastatic cartilage malignancies. It supplements classic histology and morphologic imaging with functional data which may facilitate management in individual cases.
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