Comparison of the Treatment Outcomes of Photodynamic Therapy and Ingenol Mebutate in Bowen's Disease: A Retrospective Observational Study.

PDT and IMB are effective noninvasive treatment modalities for BD. However, PDT is a safer treatment modality, considering its fewer adverse events. Particularly, with age being a factor that reduces IMB outcome, in older patients, PDT can be considered as preferred treatments over IMB.