Clinical, histological, and immunohistochemical markers of resistance to Methyl-aminolevulinate Photodynamic therapy in Bowen's disease

Abstract

Bowen's disease (BD) is an intraepidermic squamous cell carcinoma (SCC), which principally appears on photoexposed areas.¹ Methyl-aminolevulinate (MAL) photodynamic therapy (PDT) is an excellent option for the treatment of BD (strength of recommendation, A; quality of evidence, 1). However, despite good response rates, some tumors prove non-responsive due to primary or acquired resistance.² The present study sought to identify clinical, histological, and molecular variables implicated in the response to MAL-PDT in BD.

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