Abstract
10059 Background: Retinoblastoma, a primary intraocular malignancy, poses unique challenges in preserving life and vision. This retrospective study aims to analyze the impact of IVC in a population of retinoblastoma patients. The primary objective to avoid external radiotherapy, a recognized risk factor for second neoplasms, particularly in germline retinoblastoma cases. Methods: We conducted an analysis of retinoblastoma patients from 2011 to 2024. Clinical variables, including sex, age, laterality, intraocular retinoblastoma staging, and therapies employed, were prospectively documented. Results: The study included 59 patients (37 male; 22 female). Thirty-three percent of patients had unilateral tumors and an average age of 28 months at diagnosis, and 67% had bilateral tumors with an average age of 15 months. Sixty-one eyes were treated and classified at diagnosis as follow: 6 (9.8%) in groups A and B, 10(18%) in group C, 37(64%) in group D, 6(11%) in group E, and 2(3%) without initial information. IVC was administered as part of a multimodal treatment approach. A total of 203 cycles of IVC were performed, averaging 3.4 cycles per patient. Melphalan was used in 39% of cycles, followed by the combination of melphalan and topotecan in 35%, and topotecan alone in 26%. Seven of 61 (11.5%) were enucleated. Three of 61 eyes (4.9%) received radiotherapy. Control of vitreous seeds and vision preservation were achieved in 57/61 eyes (93%). No grade 3 or 4 adverse events occurred. Conclusions: IVC emerges as a crucial component in the management of retinoblastoma, offering a viable alternative to external radiotherapy. The analysis highlights the importance of this approach in preserving ocular integrity, thereby avoiding enucleation and reducing the risk of second neoplasms, particularly in germline retinoblastoma patients.
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