Biological and Therapeutic Roles of Stem Cells in Head and Neck Carcinoma: Implications for Maxillofacial Surgery

Background: Head and neck carcinomas represent a heterogeneous group of aggressive malignancies with often poor prognosis and high recurrence rates. In recent years, the identification and characterization of cancer stem cells (CSCs) within these tumors have profoundly reshaped our understanding of tumorigenesis, resistance mechanisms, and metastatic potential in this anatomical district. Cancer stem cells (CSCs) play a central role in therapeutic resistance, recurrence, and metastatic progression in head and neck squamous cell carcinoma (HNSCC), particularly within the anatomically complex maxillofacial region. This review has synthesized recent advances in CSC biology, including marker heterogeneity, stemness-associated pathways, and interactions with the tumor microenvironment. Methods: A narrative review of the available literature was conducted, focusing on studies dealing with cancer stem cells in head and neck carcinoma and their implications for maxillofacial surgery. Results: We have critically examined emerging systemic and locoregional CSC-targeted therapies, highlighting inhibitors of Notch, Wnt/β-catenin, Hedgehog, and Hippo/YAP pathways, ALDH and ABC transporter inhibitors, autophagy modulators, nanoparticle-based delivery systems, and CSC-directed immunotherapies. The implications of these approaches for surgical planning, resection margins, and postoperative disease control in maxillofacial oncology have been discussed. To enhance clarity and analytical value, we have incorporated two comprehensive tables summarizing CSC markers and therapeutic strategies. Collectively, the evidence indicates that integrating CSC-oriented diagnostics and therapeutics into multimodal management may improve long-term outcomes for patients with maxillofacial HNSCC. Conclusions: This review highlights the critical need for integrating CSC-focused research into clinical practice to develop more effective, personalized, and durable treatment strategies. Such an approach could enhance oncologic control, reduce recurrence, and improve functional outcomes for patients undergoing complex oncologic procedures in the maxillofacial region.