Talavera-Rubio MDP, García-Vicente AM, Palomar-Muñoz AM, Pilkington-Woll JP, Poblete-García VM, Soriano-Castrejón A. [Usefulness of (18)F-fluorodeoxyglucose-positron emission tomography-computerized tomography in the identification of the primary tumor in patients with cancer of unknown origin].
Med Clin (Barc) 2013. [PMID:
23177314 DOI:
10.1016/j.medcli.2012.04.033]
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Abstract
BACKGROUND AND OBJECTIVE
We determined the utility of the (18)F-fluorodeoxyglucose ((18)F-FDG) positron emission tomography (PET)-computerized tomography (CT) in the localization of the primary tumor in patients with tumor of unknown origin (TUO).
PATIENTS AND METHOD
(18)F-FDG PET-CT scans, performed between November 2006 and November 2010, in search for the primary tumor in patients with TUO, were retrospectively evaluated. Patients underwent a standard PET-CT, 50-60minutes after intravenous injection of 296-370MBq (18)F-FDG. PET-CT studies were assessed as pathological, with/without identification of the primary tumour and no pathological. Final diagnosis was established by histological confirmation and/or clinical/radiologic follow-up longer than 6 months.
RESULTS
We studied 74 patients (59 males, 15 females), with ages ranging from 41-89 years. In 38 (51%) patients the PET-CT assessed the correct origin of the primary tumour. In 8 cases, a histological confirmation in the primary lesion was obtained. In 4 patients the PET-CT showed a false positive result.
CONCLUSION
PET-CT scanning identified 51% of the primary sites in our sample of patients.
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