A slow-growing, locally destructive facial ulcer that erodes bone without lymph node spread fits basal cell carcinoma (rodent ulcer), the bank key. However, the stem's edge description is garbled: if 'even edge' was originally everted edge (with a hard, indurated base), the sources tie that edge to squamous cell carcinoma, while BCC has a rolled edge. Because the edge wording changes the answer, the key is disputed.