“…1,2 Several treatment options exist, including standard excision, 1,2 Mohs excision, 3,4 systemic retinoids, 5 radiotherapy, 6,7 curettage and electrodessication, [8][9][10] intralesional 5-fluorouracil, [11][12][13][14] and intralesional methotrexate (MTX). [15][16][17][18][19][20][21][22] Less established methods of treatment in the recent literature include intralesional interferon alfa-2b 23 and topical imiquimod. 24 Previous case reports have demonstrated intralesional MTX to be an effective, minimally invasive treatment for KA tumors, however, overall tumor cure rates and adverse events have not been systematically examined.…”