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Cite this article as: Sağlampınar Karyağar S, Tabak Dinçer S. The Diagnostic Power of the Gallium-68 Prostate-specific Membrane Antigen Positron Emission Tomography-Computed Tomography in Biochemical Recurrence After Primary Curative Treatment in Patients with Prostate Cancer: A Single-center Experience. Eur Arch Med Res 2019; 35 (4): 241-4 Received: 03.05.2019 Accepted: 26.05.2019 Address for Correspondence: Sevda Sağlampınar Karyağar, İstanbul Okmeydanı Training and Research Hospital, Clinic of Nuclear Medicine, İstanbul, Turkey Phone: +90 505 479 31 64 E-mail: ssaglampinar@gmail.com ORCID ID: orcid.org/0000-0002-6356-8280 Objective: Our study aimed to investigate the efficacy of Gallium-68 (Ga) prostate-specific membrane antigen (PSMA) positron emission tomography-computed tomography (PET-CT) in terms of focus detection in the presence of biochemical recurrence (BCR) after primary curative treatment in patients with prostate cancer (PCa). Methods: This study included 34 PCa patients who underwent Ga-PSMA PET-CT for BCR following radical prostatectomy (RP) or primary curative radiotherapy (RT), between August 2017-December 2018 at Okmeydanı Training and Research Hospital, Clinic of Nuclear Medicine. Results: Thirteen patients (38.2%) had RP and 21 (61.8%) had RT. PSMA-positive lesion was detected in 21 (61.7%) of 34 patients. PSMA positive lesion was present in six of 13 patients (46.1%) in the RP group and 15 of the 21 patients (71.4%) in the RT group. There was a PSMA-positive lesion in five out of 13 patients with serum prostate-specific antigen (PSA) values of 0.01-1 ng/mL, in five of eight patients with serum PSA values of 1-2 ng/mL, in four of five patients with serum PSA values of 2-5 ng/mL, and in seven of eight patients with serum PSA values of >5 ng/mL. PSA levels of PSMA-positive patients were found to be significantly higher than those of PSMA-negative, whereas PSA-positive and negative patients did not differ significantly in terms of PSA doubling time, time to BCR, and Gleason score. Conclusion: Ga-PSMA PET-CT is an effective method in the diagnosis of BCR after primary curative treatment in PCa patients.

european archives of medical research

The Diagnostic Power of the Gallium-68 Prostate-specific Membrane Antigen Positron Emission Tomography-Computed Tomography in Biochemical Recurrence After Primary Curative Treatment in Patients with Prostate Cancer: A Single-center Experience