NCIt definition : The second most prevalent Gleason pattern in a prostate biopsy or prostatectomy specimen.
The Gleason score is defined by adding the most prevalent (primary) and second most
prevalent (secondary) patterns.;
Alternative definition : CDISC: The second most prevalent Gleason pattern in a prostate biopsy or prostatectomy
specimen. (Gleason, D. F. (1977). The Veteran's Administration Cooperative Urologic
Research Group: histologic grading and clinical staging of prostatic carcinoma. In
Tannenbaum, M. Urologic Pathology: The Prostate. Philadelphia: Lea and Febiger. pp.
171-198.);