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  • Title: Clinical evaluation using magnetic resonance imaging for patients with stage III cervical carcinoma treated by radiation alone in multicenter analysis: its usefulness and limitations in clinical practice.
    Author: Kodaira T, Fuwa N, Toita T, Nomoto Y, Kuzuya K, Tachibana K, Furutani K, Ogawa K.
    Journal: Am J Clin Oncol; 2003 Dec; 26(6):574-83. PubMed ID: 14663375.
    Abstract:
    To evaluate the ability of magnetic resonance imaging (MRI) to predict the clinical outcome, we perform retrospective multicenter analysis of patients with stage III disease treated with radiation alone. From three institutions, 80 patients with stage III disease diagnosed with MRI were entered in the study. Seventy-eight patients received intracavitary brachytherapy with external beam radiotherapy. Univariate and multivariate analyses were performed to identify the prognostic factors for overall survival (OAS), disease-free survival (DFS), pelvic control (PC), and distant metastasis-free survival (DMFS). The 5-year OAS, DFS, PC, and DMFS rates were 59.5%, 48.7, 74.2%, and 62.5%, respectively. Bilateral pelvic fixation to the pelvis (p = 0.001) and patient age 50 years or less (p < 0.0001) were significant adverse factors for OAS. As a function of DFS, these were positive lymph nodes (p = 0.02), bilateral fixation to the pelvis (p = 0.03), and younger patient age (p < 0.0001), respectively. Patient age 50 years or less proved to be the only significantly unfavorable factor for PC (p < 0.0001). Larger size/volume (p < 0.05), positive lymph nodes (p = 0.03), bilateral pelvic disease (p = 0.02), and younger patient age (p = 0.004) were significantly adverse factors for DMFS. Using multivariate analysis, patient age 50 years or less, disease with bilateral fixation, and calculated volume more than 100 ml proved to be significantly adverse factors for OAS and DFS. In the analysis of PC, only patient age 50 years or less was a significantly adverse factor (p = 0.0014, relative risk [RR] = 14.93). Bilateral fixation to the pelvis (p = 0.0055, RR = 4.032), positive lymph nodes (p = 0.0494, RR = 2.637), and large calculated volume (>100 ml; p = 0.0057, RR = 4.831) proved to be significantly adverse factors for DMFS. For patients with stage III disease, size/volume and lymph node status derived from MRI showed a significant correlation with the development of distant metastasis, but failed to predict locoregional control. In addition, size/volume analysis showed no apparent relationship with disease-free survival. For patients with stage III disease, MRI may provide beneficial information predicting distant metastasis, but not for local control.
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