OBJECTIVE: To determine the content of dracorhodin in Diedaqili Tablets by HPLC. METHODS: The separation was performed on Diamonsil TM C18 column. The mobile phase consisted of acetonitril-0. 05mol? L-1 sodium biphosphate solution ( 45∶ 55) with detection wavelength at 440nm and flow rate at 1. 0mL? min-1. RESULTS: The calibration curve of dracorhodin was linear within the range of 0. 122～ 0. 854? g ( r=0. 999 9) , with average recovery at 101. 4% ( RSD=0. 91% ) . CONCLUSION: This method is simple, reliable and reproducible, and suitable for the quality control of Diedaqili Tablets.

A case of multiple keratoacanthoma centrifugum marginatum is first reported in China. A 37-year-old woman was admitted to the hospital for papules and plaques on her face, which had been increasing in number for 4 months. Cutaneous examination revealed dozenes of well-marginated, pale-red or skin-colored crateriform papules of variant size, and plaques in a geographic pattern on her face. The papules presented with a central umbilication filled with grey-brown corneous material. The plaques were surrounded by dyke-like borders, covered with thick, crusted brown corneous material, and partly depressed in the center. Histopathology showed hyperkeratosis, parakeratosis, irregular strip-like extension of epidermis into dermis, keratinous cysts and squamous eddies. The tumor cells had eosinophilic and glassy cytoplasm characteristic of keratoacanthoma.Given both the clinical and histologic evidence, a diagnosis of multiple keratoacanthoma centrifugum marginatum was made. After more than 3 months of treatment with oral acitretin and topical tretinoin, the lesions faded,leaving rugosity scars. No relapse was noted during 3-year follow-up.

Objective To estimate the efficacy and safety of 5-aminolevulinic acid-based photodynamic therapy (ALA-PDT) in the treatment of lichen sclerosus et atrophicus of the vulva.Methods An open and noncontrolled clinical study was performed.Forty-two patients were enrolled in this study and received ALA-PDT once every two weeks for 2 to 4 times.Follow-up visits were arranged at 2,4 and 8 weeks after initiation of treatment,and patients were evaluated at the baseline (before treatment) and all the follow-up time points for the efficacy and safety of treatment.Results Finally,38 patients completed the trial and 4 patients were lost to follow up.The total response rate was 81.6％ (31/38) at the end of the treatment.The average symptom and sign score in these patients was significantly lower at 2,4 and 8 weeks after initiation of treatment than that before treatment (17.6 ± 10.18,11.6 ± 8.35 and 7.6 ± 5.93 vs.29.3 ± 9.17,t =5.26,8.80,12.22,respectively,all P ＜ 0.01).A significant improvement was also observed in the other aspects,such as skin lesion area,hypopigmentation,erosion/rhagades and itching score at 2,4 and 8 weeks,as well as in skin atrophy at 8 weeks after initiation of treatment compared with those before treatment (all P ＜ 0.05).Local burning sensation was the main adverse reaction to ALA-PDT,and 16％ (6/38) of these patients complained of severe pain during the first treatment.Conclusion ALA-PDT shows favorable efficacy in patients with lichen sclerosus et atrophicus of the vulva with a rapid onset of action.