TY - ABST
T1 - Accuracy of 68Ga-PSMA-11 for pelvic nodal metastasis detection prior to radical prostatectomy and pelvic lymph node dissection
T2 - 2020 ASCO Annual Meeting
AU - Hope, Thomas A
AU - Armstrong, Wesley
AU - Murthy, Vishnu
AU - Lawhn Heath, Courtney
AU - Behr, Spencer
AU - Barbato, Francesco
AU - Ceci, Francesco
AU - Farolfi, Andrea
AU - Schwarzenboeck, Sarah
AU - Unterrainer, Marcus
AU - Zacho, Helle
AU - Cooperberg, Matthew R.
AU - Nguyen, Hao Gia
AU - Carroll, Peter
AU - Reiter, Robert Evan
AU - Holden, Stuart
AU - Fendler, Wolfgang Peter
AU - Eiber, Matthias
AU - Czernin, Johannes
AU - Calais, Jeremie
N1 - Virtuel conference
PY - 2020
Y1 - 2020
N2 - INTRODUCTION AND OBJECTIVE: To determine the accuracy of 68Ga-PSMA-11 PET for the detection of pelvic nodal metastases (N1) compared to histopathology at time of radical prostatectomy (RP). METHODS: This is a prospective multicenter single-arm open-label phase 3 imaging trial. Patients with intermediate to high risk prostate cancer (PCa) considered for RP with lymph node dissection (PLND) were enrolled at the University of California, Los Angeles (UCLA) and at the San Francisco (UCSF) (NCT03368547, NCT02611882, NCT02919111), and underwent one 68Ga-PSMA-11 PET. The primary endpoint was the sensitivity (Se) and specificity (Sp) of 68Ga-PSMA-11 PET for the N1 detection compared to PLND histopathology (reference-standard) on a per patient basis using nodal region-based correlation. Each scan was read by three blinded independent central readers (BICR). Consensus was based on majority rule. RESULTS: From December 2015 to August 2019, 633 patients underwent one 68Ga-PSMA-11 PET for primary staging, and 277/633 (44%) subsequently underwent RP and PLND. The median initial PSA was 11.1 [0.04-147]. 75/277 patients (27%) had N1 disease per histopathology. Using a regional based analysis, Se, Sp, positive predictive value (PPV) and negative predictive value (NPV) for N1 detection was 0.40 [0.34, 0.46], 0.95 [0.92, 0.97], 0.75 [0.70, 0.80], 0.81 [0.76, 0.85], respectively. Se was higher for patients with higher PSA: 0.29 [0.24, 0.35] for PSA <11 ng/ml versus 0.48 [0.42, 0.54] for PSA > 11. Se was higher when the nodes were larger: 0.30 [0.25, 0.36] for nodes <10 mm versus 0.68 [0.63, 0.74] for nodes > 10. The average node size in true positive patients was 10 mm versus 4 mm in false negative patients. CONCLUSIONS: In intermediate to high risk PCa patients who underwent RP and PLND, 68Ga-PSMA-11 PET detected pelvic nodal metastases with a sensitivity of 0.40 and a specificity of 0.95. Higher PSAs and larger node size correlated with increased sensitivity. Clinical trial information: NCT03368547, NCT02611882, NCT02919111.
AB - INTRODUCTION AND OBJECTIVE: To determine the accuracy of 68Ga-PSMA-11 PET for the detection of pelvic nodal metastases (N1) compared to histopathology at time of radical prostatectomy (RP). METHODS: This is a prospective multicenter single-arm open-label phase 3 imaging trial. Patients with intermediate to high risk prostate cancer (PCa) considered for RP with lymph node dissection (PLND) were enrolled at the University of California, Los Angeles (UCLA) and at the San Francisco (UCSF) (NCT03368547, NCT02611882, NCT02919111), and underwent one 68Ga-PSMA-11 PET. The primary endpoint was the sensitivity (Se) and specificity (Sp) of 68Ga-PSMA-11 PET for the N1 detection compared to PLND histopathology (reference-standard) on a per patient basis using nodal region-based correlation. Each scan was read by three blinded independent central readers (BICR). Consensus was based on majority rule. RESULTS: From December 2015 to August 2019, 633 patients underwent one 68Ga-PSMA-11 PET for primary staging, and 277/633 (44%) subsequently underwent RP and PLND. The median initial PSA was 11.1 [0.04-147]. 75/277 patients (27%) had N1 disease per histopathology. Using a regional based analysis, Se, Sp, positive predictive value (PPV) and negative predictive value (NPV) for N1 detection was 0.40 [0.34, 0.46], 0.95 [0.92, 0.97], 0.75 [0.70, 0.80], 0.81 [0.76, 0.85], respectively. Se was higher for patients with higher PSA: 0.29 [0.24, 0.35] for PSA <11 ng/ml versus 0.48 [0.42, 0.54] for PSA > 11. Se was higher when the nodes were larger: 0.30 [0.25, 0.36] for nodes <10 mm versus 0.68 [0.63, 0.74] for nodes > 10. The average node size in true positive patients was 10 mm versus 4 mm in false negative patients. CONCLUSIONS: In intermediate to high risk PCa patients who underwent RP and PLND, 68Ga-PSMA-11 PET detected pelvic nodal metastases with a sensitivity of 0.40 and a specificity of 0.95. Higher PSAs and larger node size correlated with increased sensitivity. Clinical trial information: NCT03368547, NCT02611882, NCT02919111.
M3 - Conference abstract in journal
SN - 0022-5347
VL - 203
SP - e116-e1117
JO - Journal of Urology
JF - Journal of Urology
IS - 4S
M1 - LBA02-05
Y2 - 29 May 2020 through 31 May 2020
ER -