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Usefulness of Ga-68 HBED-CC PSMA PET/CT for Tumor Staging in the Initial Diagnostic Assessment of Prostate Cancer | OMICS International | Abstract
ISSN: 2155-9619

Journal of Nuclear Medicine & Radiation Therapy
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Research Article

Usefulness of Ga-68 HBED-CC PSMA PET/CT for Tumor Staging in the Initial Diagnostic Assessment of Prostate Cancer

Schreiter V1*, Gericke M1, Beck M2, Ghadjar P2, Boening G1 and Schreiter NF3

1Department of Radiology, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany

2Department of Radiation Oncology, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany

3Department of Nuclear Medicine, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany

*Corresponding Author:
Schreiter V
Department of Radiology,
Charité- Universitätsmedizin, Berlin,
Germany
Tel:
+49 30 450657165
E-mail:
[email protected]

Received date: April 12, 2016; Accepted date: June 02, 2016 ; Published date: June 06, 2016

Citation: Schreiter V, Gericke M, Beck M, Ghadjar P, Boening G, et al. (2016) Usefulness of Ga-68 HBED-CC PSMA PET/CT for Tumor Staging in the Initial Diagnostic Assessment of Prostate Cancer. J Nucl Med Radiat Ther 7:291. doi:10.4172/2155-9619.1000291

Copyright: © 2016 Schreiter V, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Purpose: To evaluate the identification of early prostate cancer by Ga-68 HBED-CC PSMA positron emission tomography/computed tomography (PET/CT) using the TNM classification for orientation. Method: Sixteen men with a mean age of 68 ± 6.8 years (range, 55-80 years) who underwent Ga-68 HBED-CCPSMA PET/CT for initial diagnostic evaluation of suspected prostate cancer and biopsy at our department betweenAugust 2013 and June 2015 were included. Cancer extent determined by PET/CT and CT was retrospectively assessed by two independent observers (O2, O3) without knowledge of clinical findings and compared with the initial diagnosis (O1). Histology of the prostate and of suspected metastatic lesions in conjunction with the interdisciplinary TNM diagnosis served as the gold standard. Results: The TNM staging based on morphologic imaging criteria agreed with the gold standard for O1/O2/O3 in 38%/31%/50% of cases for PET/CT and in 19%/13%/13% for CT. Detection rates for O1/O2/O3 were 38/44%/56% versus 19%/19%/13% for T-stage (PET/CT versus CT), 81%/75%/81% versus 75%/63%/75% for N-stage, and 100%/100%/100% versus 100%/88%/100% for M-stage. Compared with histopathology, the TNM stage was underestimated with PET/CT (42%) and even more so with CT alone (81%). Conclusion: Ga-68 HBED-CC PSMA PET/CT appears to be superior to CT alone in determining the TNM stage of prostate cancer, specifically with regard to the T-stage. Nevertheless, even Ga-68 HBED-CC PSMA PET/CT appears to be limited for characterization of the primary tumor and tends to underestimate the T-stage. 

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