A microfocal cancer (MFC) was defined by a single core involved with [less than or equal to] 3 mm of Gleason score 3 + 3 cancer.
[5] Nonstandard abbreviations: PCa, prostate cancer; PSA, prostate-specific antigen; qRT-PCR, quantitative reverse-transcription PCR; DRE, digital rectal examination; BRM, biopsy needle rinse material; TRUS, transrectal ultrasonography; MFC, microfocal cancer.