Pathological extension is used to assign pT category for prostate cancer based on radical prostatectomy specimens.

Pathological extension is used in EOD. It was previously collected as Prostate, CS SSF# 3.

Codes (See the most current version of EOD (Prostate) (https://staging.seer.cancer.gov/) for rules and site-specific codes and coding structures.)

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.