The effect of aminolevulinic acid hydrochloride topical powder photodynamic therapy versus nocardia rubra cell wall skeleton and observers group in the treatment of cervical low-grade squamous intraepithelial lesions with human papillomavirus infection: A non-randomized study, controlled pilot study.

There are insufficient studies comparing the efficacy of aminolevulinic acid hydrochloride topical powder (ALA) photodynamic therapy (PDT) against Nocardia rubra cell wall skeleton (Nr-CWS) therapy in the treatment of cervical low-grade squamous intraepithelial lesion (LSIL) with human papillomavirus (HPV), especially for long-term efficacy. Patients with cervical LSIL and HPV infection were divided into 3 treatment groups based on their own choice. All patients had a follow-up test including HPV testing, cytology and colposcopy at 4 to 6 months and 12 months after the treatment. Among142 patients, patients received 51 ALA PDT and 41 patients received Nr-CWS. Another 50 patients who refused treatment were included in the Observers group. Four to six months or 12 months after treatment, there was significant difference between 3 groups in the clearance rate of HR-HPV infection and the complete remission (CR) rates of cervical LSIL; the CR rates of cervical LSIL in the ALA PDT group was significantly higher than the Nr-CWS group; but there was no significant difference between 2 groups in the clearance rate of HPV infection. The CR rates of cervical LSIL and the clearance rate of HPV infection in the ALA PDT group was significantly higher than the Observers group; the CR rates of cervical LSIL and the clearance rate of HPV infection in the Nr-CWS group was significantly higher than the Observers group; there was no significant difference in the recurrence rates in ALA PDT and Nr-CWS group after 12 months. Both of ALA PDT and Nr-CWS group had lower recurrence rate than the Observers group. The effect of ALA PDT is similar to Nr-CWS in the clearance rate of HR-HPV infection. Compared to the Nr-CWS group, the CR rates of cervical LSIL were considerably greater in the ALA PDT group. The effect of ALA PDT in the clearance rate of HPV infection and CR rates of cervical LSIL was significantly higher than the follow-up group; Both of ALA PDT and Nr-CWS group had lower recurrence rate than the Observers group. For cervical LSIL with HPV infection, ALA PDT is a very successful therapeutic method that is noninvasive.