Treatment of vulvar/vaginal condyloma by HPV: developed instrumentation and clinical report

摘要

Human papillomavirus (HPVs) are a family of sexually viruses with over 100 different genotypes identified till date. They are associated in 99% of cervical cancers, with HPV16 found in about 50% of cases. They are a cause of the second most common female cancer worldwide. PDT may constitute an alternative treatment for condyloma by HPV. In this work we present the development of a PDT device specifically designed for the treatment of vulvar and vaginal lesions induced by HPV. This equipment has been used in a clinical protocol and it is optically based on 640 nm LED (light emitting diodes) arrays. There are three illumination probes available that were anatomically designed for specific site applications: a 30 mm × 115 mm diffuser cylinder for intravaginal illumination and uniform irradiance of 42 mW/cm~2; a 36 mm circular probe with 118 mW/cm~2 and a 74 mm circular probe with 57 mW/cm~2, both for external illumination. The 10% aminolevulinic acid cream is topically placed over the lesions and 4-6 hours after the application the illumination is performed. The illumination time is set depending on the chosen probe and treatment area to achieve a fluence of 200 J/cm~2. In this presentation, the preliminary results of this clinical trial will be presented.