Fewer men in experimental group received diagnosis of clinically insignificant prostate cancer
By Elana Gotkine HealthDay Reporter
THURSDAY, Dec. 8, 2022 (HealthDay News) — For men with elevated prostate-specific antigen (PSA) levels, magnetic resonance imaging (MRI)-directed targeted biopsy seems better for screening and early detection than systematic biopsy, according to a study published in the Dec. 8 issue of the New England Journal of Medicine.
Jonas Hugosson, M.D., Ph.D., from Sahlgrenska University Hospital in Gothenburg, Sweden, and colleagues invited men aged 50 to 60 years to undergo regular PSA screening. Those with a PSA level of 3 ng/mL or higher underwent MRI of the prostate. One-third were randomly assigned to a reference group (5,994 participants) that underwent systematic biopsy as well as targeted biopsy of suspicious lesions; the experimental group, which included two-thirds of participants (11,986 participants), underwent targeted biopsy only.
The researchers found that 0.6 and 1.2 percent of participants in the experimental and reference groups, respectively, received a diagnosis of clinically insignificant prostate cancer (relative risk, 0.46; 95 percent confidence interval, 0.33 to 0.64). In the experimental versus the reference group, the relative risk of clinically significant prostate cancer was 0.81 (95 percent confidence interval, 0.60 to 1.1). Ten participants in the reference group had clinically significant cancer that was only detected by systematic biopsy; all cases were of intermediate risk and were mainly low-volume disease, which was managed with active surveillance.
“We found that a screening algorithm that included PSA measurement followed by MRI evaluation and targeted biopsy only, as compared with systematic biopsy of all participants with elevated PSA, led to a substantial reduction of overdiagnosis at the cost of missing a limited number of clinically significant cancers,” the authors write.
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