Ma, Xiaomei

PURPOSE Despite evidence of diagnostic accuracy but unclear long-term clinical benefit, national utilization patterns of prostate-specific membrane antigen positron emission tomography (PSMA-PET) are undefined. METHODS We conducted a serial cross-sectional study to evaluate the use of PET imaging among commercial insurance beneficiaries with prostate cancer using administrative claims from deidentified Blue Cross Blue Shield Axis database. Eligible patients included prevalent and incident prostate cancer cases. We calculated the proportions undergoing PET imaging in semiannual periods from January 1, 2016, through December 31, 2024. We examined the association between regional-level contextual sociodemographic and health care characteristics, and regional use of PSMA-PET imaging in 2024. RESULTS A total of 514,750 male beneficiaries age 40-89 years with prostate cancer were identified between 2016 and 2024. The proportion of individuals with prostate cancer undergoing PET imaging increased from 4.5 [95% CI, 4.1 to 4.9] per 1,000 in the first half of 2016 to 77.6 (95% CI, 76.2 to 79.1) per 1,000 in the second half of 2024, P < .001. Increases in PET were driven by uptake of PSMA-PET following approval in 2021, which increased from 0.8 (95% CI, 0.6 to 0.9) per 1,000 in the second half of 2021 to 77.0 (95% CI, 75.5 to 78.5) per 1,000 in the second half of 2024, P < .001. PSMA-PET use in 2024 was higher in regions with greater education (99.3 v 114.6 per 1,000 in lowest [Q1] v highest [Q4] educated) and income (95.4 v 112.3 per 1,000 in Q1 v Q4 income) measures, P < .001. CONCLUSION PSMA-PET was rapidly incorporated into clinical practice among commercial insurance beneficiaries with prostate cancer with higher adoption in geographic regions with higher income and education.

Purpose: Prostate-specific membrane antigen positron emission tomography (PSMA-PET) improves prostate cancer (PCa) localization, particularly in biochemical recurrence (BCR). The primary objective was to assess management patterns after PSMA-PET for BCR at 2 academic centers. Methods: This study evaluated clinical management within 6 months after first PSMA-PET for patients with BCR after local therapy. Management categories included no treatment, local therapy, systemic therapy, and metastasis-directed therapy (MDT). We also evaluated clinical management decision variation across strata of PSMA-PET results PSA levels (<2.0, 2.0-4.99, and ≥5.0 ng/mL) at time of imaging. Results: We identified 581 patients who received PSMA-PET from February 2021 to June 2023. PSMA-PET findings were negative in 142 (24%) and demonstrated localized recurrence in 86 (15%), regional nodal disease in 60 (10%), and distant metastasis in 293 (50%). Distant metastasis was identified in 105 (35%) patients with PSA < 2.0, 67 (60%) with PSA 2.0 to 4.99, and 115 (71%) with PSA ≥ 5.0. In patients with negative PSMA-PET, 63 (44%) received treatment. Conversely, 92% with detected metastases were treated (systemic therapy in 189 [64%], MDT in 75 [26%], and local therapy in 7 [2%]). Treatments differed by the PSA level within strata of PSMA-PET findings. Among 293 patients with metastases, MDT was used more commonly in patients with PSA < 2.0 (37%) than PSA 2.0 to 4.99 (30%) or PSA ≥ 5.0 (13%). Conclusions: Most patients undergoing PSMA-PET for BCR had identifiable disease and initiated therapy within 6 months. Identification of distant metastases and treatment choices differed by the PSA level at imaging. Prospective research is needed to determine whether earlier detection and treatment initiation improve clinical outcomes.