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2015 ; 10
(2
): 822-828
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Assessment of cell proliferation in renal cell carcinoma using dual-phase
(18)F-fluorodeoxyglucose PET/CT
#MMPMID26622577
Onishi R
; Noguchi M
; Kaida H
; Moriya F
; Chikui K
; Kurata S
; Kawahara A
; Kage M
; Ishibashi M
; Matsuoka K
Oncol Lett
2015[Aug]; 10
(2
): 822-828
PMID26622577
show ga
The present study aimed to examine the association between
(18)F-fluorodeoxyglucose ((18)F-FDG) uptake and cell proliferation markers; in
addition, the correlation between (18)F-FDG uptake and biological characteristic
in patients with renal cell carcinoma (RCC) was investigated using dual-phase
(18)F-FDG-positron emission tomography/computed tomography (PET/CT). Dual-phase
(18)F-FDG PET/CT was performed on 31 RCC patients and the maximum standardized
uptake values at 1 h (SUV1) and 2 h (SUV2) as well as the retention index (RI; %)
in the primary tumors were calculated. Monoclonal antibodies for Ki-67,
minichromosome maintenance 2 (MCM2) and topoisomerase II ? (topo II ?) were used
to assess the expression levels of their respective proteins in excised tumor
tissue using immunohistochemistry. The results demonstrated that RI and SUV2 in
patients with Stage I/II + grade 1 (G1) RCC were significantly decreased compared
with all patients with other stages/grades (RI, P=0.0065; SUV2, P=0.043); in
addition, significantly increased uptake and RI were detected in patients with
metastases compared with patients without metastases (SUV1, P=0.029; SUV2,
P=0.0003; RI, P<0.001). All proliferation markers significantly correlated with
RI (Ki-67, r=0.501, P=0.004; MCM2, r=0.359, P=0.047; topo II ?, r=0.402,
P=0.024), while SUV1 and SUV2 correlated with Ki-67 only. In conclusion, the
results of the present study demonstrated that dual-phase (18)F-FDG-PET/CT was
more useful for predicting cell proliferation in RCC compared with single-phase
imaging alone. However, follow-ups are required in order to determine whether
dual-phase (18)F-FDG-PET/CT provides independent prognostic information.