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.

Maria Lucia Calcagni, Maria Antonietta Blasi, Vittoria Rufini, Alessandro Giordano, Maria Vittoria Mattoli, Gianluigi Petrone, Maria Grazia Sammarco, Luca Indovina, Antonino Mule'

Risultato della ricerca: Contributo in rivistaArticolo in rivista

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. 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. 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. 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.
Lingua originaleEnglish
pagine (da-a)1682-1691
Numero di pagine10
RivistaEuropean Journal of Nuclear Medicine and Molecular Imaging
Stato di pubblicazionePubblicato - 2013

Keywords

  • 18F-FDG PET/CT
  • uveal melanoma

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