Erschienen in:
01.05.2014 | Scientific Article
Prognostic value of 18F-FDG PET/CT in patients with soft tissue sarcoma: comparisons between metabolic parameters
verfasst von:
Sun-pyo Hong, Seung Eun Lee, Yoon-La Choi, Sung Wook Seo, Ki-Sun Sung, Hong Hoe Koo, Joon Young Choi
Erschienen in:
Skeletal Radiology
|
Ausgabe 5/2014
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Abstract
Objectives
To investigate the relationship between volume-based PET parameters and prognosis in patients with soft tissue sarcoma (STS).
Methods
We retrospectively reviewed 55 patients with pathologically proven STS who underwent pretreatment with 18 F-Fluorodeoxyglucose (18F-FDG) PET/CT. The maximum standardized uptake value (SUVmax), average SUV (SUVavg), metabolic tumor volume (MTV), and total lesion glycolysis (TLG) of primary tumors were measured using a threshold SUV as liver activity for determining the boundary of tumors. Univariate and multivariate survival analyses for overall survival were performed according to the metabolic parameters and other clinical variables.
Results
Cancer-related death occurred in 19 of 55 patients (35 %) during the follow-up period (29 ± 23 months). On univariate analysis, AJCC stage (stage IV vs. I-III, hazard ratio (HR) = 2.837, p = 0.028), necrosis (G2 vs. G0-G1, HR = 3.890, p = 0.004), SUVmax (1 unit - increase, HR = 1.146, p = 0.008), SUVavg (1 unit - increase, HR = 1.469, p = 0.032) and treatment modality (non-surgical therapy vs. surgery, HR = 4.467, p = 0.002) were significant predictors for overall survival. On multivariate analyses, SUVmax (HR = 1.274, p = 0.015), treatment modality (HR = 3.353, p = 0.019) and necrosis (HR = 5.985, p = 0.006) were identified as significant independent prognostic factors associated with decreased overall survival.
Conclusions
The SUVmax of the primary tumor is a significant independent metabolic prognostic factor for overall survival in patients with STS. Volume-based PET parameters may not add prognostic information outside of the SUVmax.