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A prospective analysis of ¹⁸F-FDG PET/CT in patients with uveal melanoma: comparison between metabolic rate of glucose (MRglu) and standardized uptake value (SUV) and correlations with histopathological features.
- Source :
-
European journal of nuclear medicine and molecular imaging [Eur J Nucl Med Mol Imaging] 2013 Oct; Vol. 40 (11), pp. 1682-91. Date of Electronic Publication: 2013 Jul 04. - Publication Year :
- 2013
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Abstract
- Purpose: To evaluate whether standardized uptake value (SUV) and/or metabolic rate of glucose (MRglu) are different among epithelioid, mixed, and spindle cell uveal melanomas, as well as between low and high risk melanomas; to correlate ultrasonographic data and metabolic parameters with histopathological features; and to assess the role of (18)F-FDG PET/CT for evaluating prognosis.<br />Methods: Of 34 eligible patients prospectively enrolled with clinical suspicion of medium/large uveal melanoma, 26 (15 men, mean age 62.8 ± 11.8 years) were evaluated. All patients underwent metastatic work-up, 3-D dynamic brain and whole-body (18)F-FDG PET/CT, and surgery.<br />Results: Of the 26 ocular lesions, 23 showed (18)F-FDG uptake, with a sensitivity of 88 %. MRglu was significantly higher in the epithelioid cell melanomas than in the spindle cell melanomas, as well as in high-risk lesions than in low-risk lesions (p = 0.01, p = 0.02, respectively). SUV and MRglu were correlated with histopathological features while ultrasonographic data were not.<br />Conclusion: MRglu is useful for distinguishing the different cell types in uveal melanoma, as well as high-risk from low-risk lesions, while SUV is not. MRglu provides a more accurate evaluation of glucose consumption, whereas SUV provides only an estimation. In addition, the metabolic parameters correlate with histopathological features, well also reflecting cellular behaviour in ocular malignancy. A longer follow-up is needed to assess the role of (18)F-FDG in evaluating prognosis.
- Subjects :
- Aged
Female
Humans
Male
Melanoma metabolism
Melanoma pathology
Middle Aged
Multimodal Imaging
Prospective Studies
Tomography, X-Ray Computed
Uveal Neoplasms metabolism
Uveal Neoplasms pathology
Fluorodeoxyglucose F18 pharmacokinetics
Glucose metabolism
Melanoma diagnostic imaging
Positron-Emission Tomography
Radiopharmaceuticals pharmacokinetics
Uveal Neoplasms diagnostic imaging
Subjects
Details
- Language :
- English
- ISSN :
- 1619-7089
- Volume :
- 40
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- European journal of nuclear medicine and molecular imaging
- Publication Type :
- Academic Journal
- Accession number :
- 23824464
- Full Text :
- https://doi.org/10.1007/s00259-013-2488-6