Diagnostic value of dual-head 18F-FDG imaging in metastatic lesion with unknown primary tumour.
- Author:
Yan-ji PAN
1
;
Guang-yu WEI
;
Yan-lin FENG
;
Feng-wen YU
;
De-jun LIU
;
Ning ZHANG
Author Information
- Publication Type:Journal Article
- MeSH: Female; Fluorodeoxyglucose F18; Humans; Lung Neoplasms; diagnostic imaging; pathology; Lymph Nodes; diagnostic imaging; pathology; Lymphatic Metastasis; Male; Neoplasms, Unknown Primary; diagnostic imaging; pathology; Positron-Emission Tomography
- From: Chinese Journal of Oncology 2005;27(9):565-566
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the diagnostic value of dual-head (18)F-fluorodeoxyglucose ((18)F-FDG) imaging in metastatic lesion with unknown primary tumour (UPT).
METHODSSeventy patients with UPT underwent dual-head (18)F-FDG imaging after iv (18)F-FDG 1.85 MBq/kg. The primary tumour was diagnosed according to the FDG uptake and T/N value.
RESULTSOf the 70 patients, the primary tumour was identified by positive FDG imaging and finally confirmed pathologically in 58 patients (82.9%), and 12 patients had a negative FDG imaging (17.1%). Forty-two of the 58 positive patients were found to have lung cancer (72.4%). Among the 12 negative patients, their primary tumour was then identified by other diagnostic procedures in 5 patients (41.7%), in 1 patient, the primary site was detected during follow-up, however, the primary tumour was never detected in the rest 6 patients.
CONCLUSIONDual-probe (18)F-FDG imaging is a simple, quick, non-invasive and sensitive technique with an accuracy over 80% in the diagnosis of unknown primary tumour. The lung is found to be the most frequent primary site. Dual-probe (18)F-FDG imaging can be recommended as the first diagnostic choice for UPT.
