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Background Photodynamic therapy (PDT) is a well-known and effective treatment for non-melanoma skin-cancer. Numerous studies have also shown its effectiveness in mycosis fungoides. The aim of the study was to analyse MF patients treated with PDT at the Dermatology Unit of Bologna University. Methods We retrospectively analysed MF patients treated with PDT over the last ten years. Each PDT protocol consisted of the appliance for 3 h under an occlusive film dressing on each lesion of a one-mm-thick layer of 16% methyl aminolaevulinate (MAL) 160 mg/g cream (Metvix ® , Galderma, Paris, France). The cream was then removed and the skin was exposed to 630 nm red light from a diode lamp (Aktilite ® , Galderma Benelux, Rotterdam, the Netherlands), with a total radiation dose of 37 J/cm2 for 9 mins. A protocol of one session every month was scheduled. The treated lesions were clinically examined, before each treatment. Results Four cases, three male and one female, had been treated with PDT. Two patch lesions on the plantar area, one leg and the pubic area were treated. The number of PDT sessions ranged from 4 to 9. Two complete remissions and two partial remissions were observed. A low-to-mild burning sensation was reported during the treatment, and persisted over the next day; no further side effects were observed. Conclusions Our series shows that PDT can be considered an effective second-line treatment in patients characterised by a disease located in difficult-to-treat anatomical areas such as the feet and the pubic area.