Abstract
Purpose
This study was conducted to investigate whether 18F-fluorodeoxyglucose (FDG) uptake, quantified by positron emission tomography (PET), correlates with histological variables including tumour grade, cell proliferation, cell cycle control integrity and glucose metabolism in patients with bone and soft tissue sarcomas.
Methods
Eighty-two patients clinically suspected of having a bone or soft tissue sarcoma underwent FDG PET within 1 week prior to operation and 63 patients (mean age 48 years, range 18–74 years) were enrolled in the complete analysis. We excluded 17 patients with pathologically confirmed benign tumours and two patients with uncontrolled diabetes or concomitant malignancy from data analysis. Maximum and average standardised uptake values (SUVs) of the primary lesion were compared with histological variables including tumour differentiation, the presence of necrosis, MIB-1 score, mitotic score, p53 overexpression, MIB-1 grade, mitotic grade and GLUT-1 expression.
Results
Significant correlations were found between maximal and mean SUVs and MIB-1 grade, mitotic grade, MIB-1 score, tumour differentiation and mitotic score. The mean and maximal SUVs were significantly higher in tumours with p53 overexpression than in those without p53 overexpression (p<0.0001). GLUT-1-positive tumours had significantly higher mean (6.5±4.2 vs 1.1±0.2, p=0.006) and maximal SUVs (8.8±5.4 vs 1.7±0.5, p=0.005) than the GLUT-1-negative tumours. GLUT-1 intensity correlated positively with both mean (r=0.500, p<0.0001) and maximal SUVs (r=0.509, p<0.0001). Mu ltiple linear regression analysis showed a significant correlation between maximal SUV and MIB-1 grade (p<0.0001).
Conclusion
The enhanced glucose metabolism, as determined by SUV, is a strong index of tumour grade in bone and soft tissue sarcomas.
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Acknowledgements
We thank Hiromitsu Daisaki, Takeshi Murano, and Masashi Suzuki for helping to develop the criteria for the technical quality of the FDG PET/CT imaging; Tetsuo Maeda and Mototaka Miyake for assisting with the literature search; and Yasuo Beppu, Hirokazu Chuman, Akira Kawai and Fumihiko Nakatani for assisting with clinical information. This work was supported in part by grants from Scientific Research Expenses for Health and Welfare Programs, No. 17-12, the promotion and standardization of diagnostic accuracy in PET/CT imaging and BMS Freedom to Discovery Grant. This work was also supported by Travel Grant of the Princess Takamatsu Cancer Research Fund.
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Tateishi, U., Yamaguchi, U., Seki, K. et al. Glut-1 expression and enhanced glucose metabolism are associated with tumour grade in bone and soft tissue sarcomas: a prospective evaluation by [18F]fluorodeoxyglucose positron emission tomography. Eur J Nucl Med Mol Imaging 33, 683–691 (2006). https://doi.org/10.1007/s00259-005-0044-8
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DOI: https://doi.org/10.1007/s00259-005-0044-8