视网膜母细胞瘤是儿童最常见的原发性恶性眼内肿瘤。播种,特别是肿瘤扩散到相邻的区室,代表根据国际视网膜母细胞瘤分类确定视网膜母细胞瘤程度的主要参数。在这篇文章中,我们专注于玻璃体播种,视网膜母细胞瘤成功“眼部保存治疗”的主要限制因素之一。本文概述了视网膜母细胞瘤玻璃体种植的历史,既定的治疗程序和新的研究模式。1990年代末在视网膜母细胞瘤的治疗中引入了全身化疗,这是一个重大突破,这使得逐渐放弃放射治疗及其伴随的副作用。然而,全身化疗期间玻璃体腔内化疗药物的浓度不足以治疗玻璃体种植,全身化疗的毒性作用是不可忽视的。随着原位化疗的出现,发生了重大变化,随着化疗药物的靶向给药,即动脉内和玻璃体内注射,有助于彻底根除外部放疗和减少全身化疗。尽管玻璃体播种仍然是动脉内化疗失败的最常见原因,这项技术显著影响了视网膜母细胞瘤患儿的原始治疗方案.然而,玻璃体内化疗对提高晚期患者保留眼球和视觉功能的可能性做出了最大贡献。新型局部给药方式,基因治疗,几个正在进行的临床前和临床试验中的溶瘤病毒和免疫疗法可能代表了玻璃体视网膜母细胞瘤种植治疗的有希望的方法,尽管尚未完成常规使用的临床试验。
Retinoblastoma is the most common primary malignant intraocular tumor in children. Seeding, specifically the dispersion of the tumor into the adjacent compartments, represents a major parameter determining the degree of retinoblastoma according to the International Classification of Retinoblastoma. In this article we focused on vitreous seeding, one of the main limiting factors in the successful \"eye preservation treatment\" of retinoblastoma. This article presents an overview of the history of vitreous seeding of retinoblastoma, established treatment procedures and new-research modalities. The introduction of systemic chemotherapy in the treatment of retinoblastoma at the end of the 1990s represented a significant breakthrough, which enabled the progressive abandonment of radiotherapy with its attendant side effects. However, the attained concentrations of chemotherapeutics in the vitreous space during systemic chemotherapy are not sufficient for the treatment of vitreous seeding, and the toxic effects of systemic chemotherapy are not negligible. A significant change came with the advent of chemotherapy in situ, with the targeted administration of chemotherapeutic drugs, namely intra-arterial and intravitreal injections, contributing to the definitive eradication of external radiotherapy and a reduction of systemic chemotherapy. Although vitreous seeding remains the most common reason for the failure of intra-arterial chemotherapy, this technique has significantly influenced the original treatment regimen of children with retinoblastoma. However, intravitreal chemotherapy has made the greatest contribution to increasing the probability of preservation of the eyeball and visual functions in patients with advanced findings. Novel local drug delivery modalities, gene therapy, oncolytic viruses and immunotherapy from several ongoing preclinical and clinical trials may represent promising approaches in the treatment of vitreous retinoblastoma seeding, though no clinical trials have yet been completed for routine use.