“…12 Identifying predictors for the degree of subclinical tumour spread can guide surgeons in efficient scheduling of patients and in estimating time needed for operation and reconstruction. 12,14,17 Patient and BCC characteristics A retrospective study was done based on digital patient records to collect pre-operative patient and tumour characteristics. The following variables were recorded for all patients: date of birth, age at time of MMS, gender, tumour size, anatomical location, histological BCC subtype, primary or recurrent BCC and number of required stages for microscopic tumour clearance.…”