Platelet‐Rich Plasma Injections and Scalp Cutaneous Malignancies: Clinical Implications and Knowledge Gaps

Platelet‐rich plasma (PRP) injections are an effective and increasingly utilized treatment for androgenetic alopecia; however, the delivery of concentrated growth factors raises theoretical concerns regarding cutaneous malignancy risk in chronically ultraviolet (UV)‐exposed, hair‐thinning scalps. In this article, the current hypotheses linking PRP to scalp skin cancer risk are reviewed, including potential oncogenic mechanisms, such as platelet‐derived growth factor (PDGF)‐mediated signaling, and protective effects, such as improved hair‐mediated photoprotection and antiproliferative findings from related blood products, although direct PRP‐specific data remain lacking. Overall, the available evidence supports PRP safety while underscoring the need for prospective studies, routine scalp surveillance, and patient counseling regarding photoprotection.