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International Journal of Clinical Oncology

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01.04.2015 | Original Article

[¹⁸F]fluoro-2-deoxyglucose-positron emission tomography for the assessment of histopathological response after preoperative chemoradiotherapy in advanced oral squamous cell carcinoma

verfasst von: Hiroyuki Shimomura, Tomonori Sasahira, Yasutsugu Yamanaka, Miyako Kurihara, Yuichiro Imai, Shigehiro Tamaki, Nobuhiro Yamakawa, Norihisa Shirone, Masatoshi Hasegawa, Hiroki Kuniyasu, Tadaaki Kirita

Erschienen in: International Journal of Clinical Oncology | Ausgabe 2/2015

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Abstract

Background

[¹⁸F]fluoro-2-deoxyglucose-positron emission tomography (FDG-PET) is widely used to evaluate tumor metabolic activity. The aim of this study was to evaluate the usefulness of FDG-PET in assessing the histopathological response to preoperative concurrent chemoradiotherapy (CRT) in patients with oral squamous cell carcinoma (OSCC).

Methods

Forty-five patients with resectable advanced OSCC who had received preoperative CRT followed by tumor ablative surgery between January 2004 and December 2011 were included in the study. All patients underwent FDG-PET before and after preoperative CRT. The maximum standardized uptake value (SUVmax) before (pre-SUV) and after preoperative CRT (post-SUV) and the SUVmax reduction rate (ΔSUV %) were used to evaluate the response to preoperative CRT. Correlations among SUVmax, histopathological response, and expression of cancer antigen Ki-67 and hypoxia-inducible factor-1α (HIF-1α) were analyzed.

Results

Preoperative CRT significantly reduced intratumoral FDG uptake (P < 0.001). The pre-SUV and post-SUV were significantly lower in patients with a pathological complete response (pCR) than in those with a non-pCR (pre-SUV P = 0.037; post-SUV P = 0.001). ΔSUV % was higher in patients with pCR than in those with non-pCR (P = 0.029). The pre-SUV was significantly correlated with Ki-67 and HIF-1α expression in pretreatment biopsy specimens (Ki-67 P = 0.046, R = 0.292; HIF-1α P = 0.007, R = 0.385). The expression of both Ki-67 and HIF-1α was significantly lower in patients with pCR than in those with non-pCR (Ki-67 P < 0.001; HIF-1α P < 0.001).

Conclusions

Low pre-SUV and post-SUV and high ΔSUV % may predict a good histopathological response to preoperative CRT. Ki-67 and HIF-1α expression in pretreatment biopsy specimens were predictors of histopathological response to preoperative CRT.

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Titel: [18F]fluoro-2-deoxyglucose-positron emission tomography for the assessment of histopathological response after preoperative chemoradiotherapy in advanced oral squamous cell carcinoma
verfasst von: Hiroyuki Shimomura
Tomonori Sasahira
Yasutsugu Yamanaka
Miyako Kurihara
Yuichiro Imai
Shigehiro Tamaki
Nobuhiro Yamakawa
Norihisa Shirone
Masatoshi Hasegawa
Hiroki Kuniyasu
Tadaaki Kirita
Publikationsdatum: 01.04.2015
Verlag: Springer Japan
Erschienen in: International Journal of Clinical Oncology / Ausgabe 2/2015
Print ISSN: 1341-9625
Elektronische ISSN: 1437-7772
DOI: https://doi.org/10.1007/s10147-014-0711-5

Springer Medizin

[¹⁸F]fluoro-2-deoxyglucose-positron emission tomography for the assessment of histopathological response after preoperative chemoradiotherapy in advanced oral squamous cell carcinoma