조기 성문암의 치료 전 Fluorodeoxyglucose-Positron Emission Tomography/ Computed Tomography(FDG-PET/CT)의 역할
Role of Fluorodeoxyglucose-Positron Emission Tomography/Computed Tomography in Preoperative Staging of Early Glottic Cancer
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Background and Objectives Fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) has been widely used to detect regional and distant metastasis or second primary cancers at initial evaluation. The aim of this study was to evaluate the role of combined FDG-PET/CT in detecting early glottic cancers, which has low incidence of regional or distant metastasis. Subjects and Method We enrolled in our study 551 patients who had previously untreated glottic cancer between 2001 and 2008. Of these, 124 patients with early glottic cancer underwent FDG-PET/CT. Retrospectively, we compared the detection rates of regional, distant metastasis or second primary cancer by FDG-PET/CT with those after neck computed tomography (CT),chest X-ray, and liver sonography. Results In detecting regional metastasis, the sensitivity and specificity of FDG-PET/CT were 66.67% and 97.25%, respectively, with the positive predictive value (PPV) of 40%, the negative predictive value (NPV) of 99.16%, and the accuracy of 96.77%. The sensitivity, specificity, PPV,NPV and accuracy of neck CT were 66.67%, 96.69%, 33.33%, 99.15%, and 95.96%, respectively. The suspicious distant metastasis (n=1) and second primary cancers (n=7) were observed in FDG-PET/CT. The true second primary cancers occurred at the colon (n=1) and the prostate (n=2). The other cases were proved to be false positive. Distant metastasis and second primary cancers were not detected by the conventional work-up tests. Conclusion The regional metastasis detection rate of FDG-PET/CT was similar to those of the conventional work-up tests. However, compared to the conventional tests, FDG-PET/CT is useful for detecting distant metastasis or second primary cancers in patients with early glottic cancer. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:419-24
Abstract
Background and Objectives Fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) has been widely used to detect regional and distant metastasis or second primary cancers at initial evaluation. The aim of this study was to evaluate the role of combined FDG-PET/CT in detecting early glottic cancers, which has low incidence of regional or distant metastasis. Subjects and Method We enrolled in our study 551 patients who had previously untreated glottic cancer between 2001 and 2008. Of these, 124 patients with early glottic cancer underwent FDG-PET/CT. Retrospectively, we compared the detection rates of regional, distant metastasis or second primary cancer by FDG-PET/CT with those after neck computed tomography (CT),chest X-ray, and liver sonography. Results In detecting regional metastasis, the sensitivity and specificity of FDG-PET/CT were 66.67% and 97.25%, respectively, with the positive predictive value (PPV) of 40%, the negative predictive value (NPV) of 99.16%, and the accuracy of 96.77%. The sensitivity, specificity, PPV,NPV and accuracy of neck CT were 66.67%, 96.69%, 33.33%, 99.15%, and 95.96%, respectively. The suspicious distant metastasis (n=1) and second primary cancers (n=7) were observed in FDG-PET/CT. The true second primary cancers occurred at the colon (n=1) and the prostate (n=2). The other cases were proved to be false positive. Distant metastasis and second primary cancers were not detected by the conventional work-up tests. Conclusion The regional metastasis detection rate of FDG-PET/CT was similar to those of the conventional work-up tests. However, compared to the conventional tests, FDG-PET/CT is useful for detecting distant metastasis or second primary cancers in patients with early glottic cancer. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:419-24
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