In a examine of over 500 treatment-naïve males with not less than certainly one of three main threat elements for prostate most cancers, 43 p.c of these with all three threat elements (PSA values > 20 ng/ml, ISUP grade > 3 and MRI T-stage > 3) had proof of metastatic prostate most cancers (PCa) on 68Ga-PSMA-11 PET/CT imaging.
For the retrospective examine, introduced on the 2024 Society of Nuclear Medication and Molecular Imaging (SNMMI) Annual Assembly, researchers examined correlations between scientific elements, imaging parameters and metastatic PCa in 525 males who had 68Ga-PSMA-11 PET/CT imaging,
In a univariable evaluation, the researchers discovered that 11.8 p.c of these having not less than one of many aforementioned threat elements for PCa had metastatic PCa on 68Ga-PSMA-11 PET/CT imaging. The proportion of sufferers with metastatic PCa greater than doubled (25.6 p.c) with two threat elements and climbed to 43.5 p.c with all three threat elements, in accordance with the examine authors. The researchers famous the correlations between elevated PSA stage and MRI T-stage >3 with metastatic PCa on PET/CT imaging had been additionally evident within the multivariable evaluation.
Whereas MRI imaging confirmed no focal suspicious areas (B and E) nor focal areas of diffusion restriction (C and F) in a 63-year-old man with a PSA stage of 32 ng/ml, PET/CT revealed nodal metastases (A and D) in addition to a suspicious left iliac node (G). (Photos courtesy of SNMMI.)
“Inside this massive tertiary cohort, the PSA at prognosis and MRI T-stage > 3 had been important impartial predictors of the presence of metastases in topics presenting with a brand new prognosis of prostate most cancers,” famous examine co-authors Amy Sharkey, M.D., a scientific analysis fellow on the Biomedical Analysis Middle at King’s Faculty London, and Gary J.R. Prepare dinner, MBBS, MSc, M.D., who’s affiliated with the Division of Most cancers Imaging on the Faculty of Engineering and Imaging Sciences at King’s Faculty London in the UK.
Whereas the SUVmax for major lesions on 68Ga-PSMA-11 PET/CT imaging was related to the three aforementioned threat elements in addition to a cribriform sample and perineural invasion, the examine authors discovered no statistical distinction between sufferers with biochemical recurrence (BCR) and people with out BCR, no matter remedy with radical prostatectomy (RP) or healing intent radiotherapy (RT).
“(The SUVmax) was not predictive of BCR in topics present process RP or RT remedy throughout a median follow-up of 509.5 days,” added Drs. Sharkey and Prepare dinner.
Reference
1. Sharkey A, Prepare dinner GJR. 68Ga-PSMA-11 PET/CT for baseline staging of high-risk prostate most cancers: associations between scientific threat elements, metastases and imaging parameters. Introduced on the 2024 Society of Nuclear Medication and Molecular Imaging Annual Assembly, June 8-11, Toronto, Canada. Out there at: https://www.xcdsystem.com/snmmi/program/10OD8Tq/index.cfm . Accessed June 20, 2024.
