Photodynamic therapy of basal cell carcinoma and factors affecting the response to treatment / 中国医师杂志

ABSTRACT

Objective To investigate efficacy and safety of photodynamic therapy on basal cell carcinomas.Methods Twenty three cases of basal cell carcinomas were given with photosensitizer 5-amino acid (ALA) ketone spreading on skin lesions.Reddish illumination was taken at 4h later with energy density at 100 J/cm2,40 min/time,and weekly for a total of 4 weeks; and 2 year followup in the study was evaluated recurrence retrospectively.Results Among twenty three patients with basal cell carcinomas,15 were cured(65.22％),5 partially (21.74％) remitted,and 3 ineffective (13.04％),with the efficiency 86.96％.None of the resolved lesions recurred during the 6-month follow-up period,and 3 cases were recurred within 1 year (20％).Repeated ALA-photodynamic therapy (PDT) treatment,recurred lesions were completely resolved.There were no additional recurrences after 2 year.ALA-PDT was well tolerated,and adverse effects were limited to mild local pain and erythema.Only three patients were complained of erythema and edema.Complete response rate was higher in younger patients (t =-2.94,P ＜0.01) and those with smaller lesions (t =-5.92,P ＜ 0.01).Superficial type had also significant higher response rate (x2 =27.17,P ＜ 0.01).Conclusions The application of photodynamic therapy in treatment of basal cell carcinoma is effective with less painfulness,non-invasiveness,and without side effect.It demonstrated a good efficacy and satisfactory cosmetic outcomes.