2.3 Variables collected
Patient demographics, biopsy pathologic findings, surgical pathologic features, and other clinical characteristics were collected from each record. This data was recorded and stored on the our institution’s REDCap, a secure web platform for building and managing online databases. Tumor infiltrating lymphocyte (TIL) status at biopsy was reported as preset-brisk, present-non brisk, and absent. We analyzed this variable considering all 3 categories and also as present (both brisk and non-brisk) vs absent where indicated in the Results section. Mitotic rate was recorded as >1 or <1. The primary outcome was progression-free survival (PFS). Progression was defined as either melanoma recurrence or death by any cause. Patients were censored after their last documented encounter, including either phone call or office visit with any provider, in the medical record.