بررسی تأثیر کمکی شیمی درمانی موضعی در درمان رتینوبلاستوم پیشرفته داخل چشمی

    Background and Aim: Although combined "Chemotherapy and Focal therapy" is very efficient in the treatment of the low grade forms of Retinoblastoma (Rb), more effective therapeutic measures are required to control the spread of the disease into vitreous and subretinal areas.This study was conducted with the aim of evaluating the effectiveness of chemotherapy combined with perioricular injection of carboplatin in the treatment of advanced of intraocular Retinoblastoma.Patients and Methods: In this prospective interventional case series, 16 eyes from 16 patients with groups C or D retinoblastoma (Rb) (case group) and 18 eyes from  17 patients with groups C or D retinoblastoma (control group) were investigated. Systemic chemotherapy by VEC protocol and focal treatments were done in both groups. In case group, periocular injection of Carboplatin was done as an adjuvant treatment. Examination under general anesthesia and fundus photography by Ret-Cam was done for all patients before entering the study. The mean volume of Carboplatin injections in each session was 15 mg. SPSS V. 15 was used. For statistical analyses Fischers exact, Chi-square and Mann-Whitney tests were used.Results: Mean age was 28.6 months in case group and 26.6 months in control group. There were7 males and 9 females in case group and 7 males and 10 females in control group. The mean of chemotherapy sessions were 9 cycles in case group and 9.3 in control group. In case group, the mean number of Carbolatin injections in each eye was 3 times (1 to 5 times). Distribution of other focal treatments (cryotherapy, brachytherapy and transpupillary thermotherapy) was almost the same in both groups.In case group, 9 eyes were in group C and 7 eyes were in group D. In control group, 9 eyes were in group C and 9 eyes were in group D. The mean of follow up period was 27 months.At the end of study, in case group 5 eyes (31%) were enucleated 10 eyes were in complete regression and 1 eye was controlled by brachytherapy. Finally 69% of eyes were in complete regression in case group. In control group 10 eyes (55%) were enucleated and 8 eyes (45%) were in regression. Conclusion: Although adjuvant periocular carboplatin injection associated with systemic chemotherapy and focal treatment resulted in more preservation of globe in patients with advanced Rb, the difference however between case group and control group was not significant statistically. So, a prospective randomized clinical trial with larger sample size and longer follow up period is recommended.