The role of ( 68 Ga)PSMA I&T in biochemical recurrence after radical prostatectomy: detection rate and the correlati

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ORIGINAL ARTICLE

The role of (68Ga)PSMA I&T in biochemical recurrence after radical prostatectomy: detection rate and the correlation between the level of PSA, Gleason score, and the ­SUVmax Ugur Yilmaz1 · Halil Komek2   · Canan Can2 · Serdar Altindag2 Received: 3 March 2019 / Accepted: 28 April 2019 © The Japanese Society of Nuclear Medicine 2019

Abstract Objective  The aim of the study was to retrospectively evaluate the recurrence detection rate of Gallium-68-prostate-specific membrane antigen [(68Ga)PSMA] imaging and therapy (I&T) positron emission tomography/computed tomography (PET/ CT) at different PSA levels, which enables early detection of patients with radical prostatectomy. We also aimed to compare Gleason scores, used drugs (LHRH analogs and antiandrogens), PSA levels with ­SUVmax values, and detection rates. Method  This retrospective study included 107 patients who underwent radical prostatectomy and who underwent (68Ga) PSMA I&T PET/CT imaging between January 2015 and December 2018 for the early detection of recurrence. The PSA values, Gleason scores, treatments, lesions detected on (68Ga)PSMA I&T, and S ­ UVmax values were recorded for all patients. Results  Patients with a median PSA level of 1.22 ng/mL were divided into seven groups according to the PSA values. The lowest lesion detection rate was found to be 7/16 patients (43.8%) when the PSA was  3.5 ng/ml. There was a positive correlation between PSA level and ­ppSUVmax (per patient ­SUVmax) value of the patients with lesions (p