Hai He, Zishuai Chen, Hengxiang Liu, Xiaohua Zhang, Zhiqiang Li, Heqiang Yang, Xiaoyong Chen, Yufei Yang, Zifan Wang. A Proposed Microneedle–Small Extracellular Vesicle System for Localized Adjunctive Treatment of Established Oral Squamous Cell Carcinoma: A Narrative Review and Preclinical Development Perspective. Cells 2026; 15(17)doi: 10.3390/cells15171527