Efficacy of hematoporphyrin injection (HpD) photodynamic therapy in the treatment of widespread extramammary Paget's disease.

Photodynamic therapy (PDT) utilizing Hematoporphyrin Derivative (HpD) injection has been demonstrated as an efficacious treatment for various conditions, including Bowen's disease, subtypes of basal cell carcinomas, and actinic keratosis. While surgical resection is considered the primary treatment option for extramammary Paget's disease (EMPD), some patients may not be suitable candidates for surgical intervention. ALA-PDT may have some benefits in treating EMPD in select patients, while Hematoporphyrin Derivative-Photodynamic Therapy (HpD-PDT) has demonstrated promising potential as a cancer treatment. We present one case of vulvar extramammary Paget's disease (EMPD), that is a female patient with lesions in the vulva and involving the urethra. Due to advanced age, underlying diseases, the extensive affected area, and the specific location of the vulvar lesion, the patients were unable to undergo surgical treatment. Therefore, the patient declined traditional wide local excision and instead opted for hematoporphyrin photodynamic therapy. Treatment eliminated the tumor, but it recurred locally after 1.5 years of follow-up. Localized small-scale recurrence at the affected site can be treated with surgical resection or photodynamic therapy to achieve complete clearance of the lesion. However, the patient refuses further examination and treatment. EMPD has a high recurrence rate, but we propose that hematoporphyrin photodynamic therapy is an effective alternative to conventional surgery for treating this condition, even in case of recurrence.