Classic Kaposi sarcoma (KS) usually is a localized and slowly progressing disease that mainly affects elderly patients; therefore, local treatment generally is recommended. In this study, we evaluated the clinical efficacy of intralesional vinblastine (VNB) for the treatment of classic KS in 6 participants with type 2 diabetes mellitus. Results indicated that intralesional VNB injections may be an effective alternative treatment of classic KS in diabetic patients.