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Bobrowski A, Metser U, Finelli A, Fleshner N, Berlin A, Perlis N, Kulkarni GS, Chung P, Kuhathaas K, Atenafu EG, Hamilton RJ. Salvage lymph node dissection for prostate-specific membrane antigen (PSMA) positron emission tomography (PET)-identified oligometastatic disease. Can Urol Assoc J 2021; 15:E545-E552. [PMID: 34665714 DOI: 10.5489/cuaj.6988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The availability of prostate-specific membrane antigen (PSMA) positron emission tomography (PET)/computed tomography (CT) imaging, particularly in the setting of rising prostate-specific antigen (PSA) after definitive treatment, has led to oligometastatic prostate cancer being increasingly identified. Despite the enthusiasm surrounding treating oligometastatic disease, it has been relatively understudied. We sought to review our salvage lymphadenectomy experience in the PSMA PET/CT era. METHODS We retrospectively reviewed patients undergoing lymphadenectomy following curative-intent primary therapy with rising PSA who had undergone a PSMA PET/CT identifying oligometastatic disease (defined as ≤5 PSMA-avid lesions) between January 2016 and April 2020. The primary endpoint was complete response, defined as achieving a PSA <0.2 ng/ml without concomitant androgen deprivation therapy (ADT). RESULTS Twenty-two patients were included. Primary curative therapy included radical prostatectomy (86.4%) and brachytherapy (13.6%). Median PSA at salvage surgery was 1.72 ng/ml. Pelvic lymph node dissection was the most performed procedure (72.7%). Median node yield was 10.5, with a median of 1.5 positive nodes on pathology. Eight patients (36.4%) achieved PSA <0.2, with six (27.3%) remaining with PSA <0.2 after a median followup of 23.1 months. Nine (40.9%) had an initial PSA decline, but nadired ≥0.2, and in five (22.7%) the PSA rose immediately after surgery. Overall, ADT was started in seven patients (31.8%) at a median of 10.1 months post-salvage surgery. CONCLUSIONS In our series of salvage dissection for PSMA-PET-detected nodal oligometastases, approximately a third achieved PSA <0.2; yet, it was only durable in 27%. Prospective trials of salvage nodal radiation are ongoing, however, more prospective trials of salvage node dissection are needed.
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Affiliation(s)
- Adam Bobrowski
- Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Ur Metser
- Department of Diagnostic Radiology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Antonio Finelli
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Neil Fleshner
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Alejandro Berlin
- Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Nathan Perlis
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Girish S Kulkarni
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Peter Chung
- Department of Radiation Oncology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Kopika Kuhathaas
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Eshetu G Atenafu
- Department of Biostatistics, Princess Margaret Cancer Centre, Toronto, ON, Canada
| | - Robert J Hamilton
- Division of Urology, Princess Margaret Cancer Centre, Toronto, ON, Canada
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Zukotynski KA, Rowe SP. Histologic Validation of 18F-DCFPyL PET/CT with Comparison to Multiparametric MRI in Biochemically Recurrent Prostate Cancer. Radiology 2020; 296:573-574. [DOI: 10.1148/radiol.2020202098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Katherine A. Zukotynski
- Departments of Radiology and Medicine, McMaster University, 1200 Main St W, Room 1P11, Hamilton, ON, Canada L8N 3Z5 (K.A.Z.); and Departments of Radiology, Oncology and Urology, Johns Hopkins University School of Medicine, Baltimore, Md (S.P.R.)
| | - Steven P. Rowe
- Departments of Radiology and Medicine, McMaster University, 1200 Main St W, Room 1P11, Hamilton, ON, Canada L8N 3Z5 (K.A.Z.); and Departments of Radiology, Oncology and Urology, Johns Hopkins University School of Medicine, Baltimore, Md (S.P.R.)
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