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Background/aims: To evaluate the likelihood of germline mutation in patients presenting with solitary retinoblastoma based on tumour location at first examination., Methods: Retrospective analysis of solitary unilateral retinoblastoma for likelihood of germline mutation (family history of retinoblastoma and/or genetic testing indicating germline RB1 mutation and/or development of additional new or bilateral tumours) based on tumur location at presentation (macular vs extramacular)., Results: Of 480 consecutive patients with solitary retinoblastoma, 85 were in the macula (18%) and 395 were extramacular (82%). By comparison (macular vs extramacular tumours), macular tumours had smaller basal diameter (12.7 mm vs 18.9 mm, p < 0.001) and smaller tumour thickness (6.1 mm vs 10.7 mm, p < 0.001). Patients with macular tumours demonstrated greater likelihood for germline mutation (23% vs 12%, OR=2.18, p = 0.011), specifically based on family history of retinoblastoma (13% vs 2%, OR=4.64, p = 0.004), genetic testing showing germline RB1 mutation (27% vs 15%, OR=2.04 (95% CI 1.04 to 4.01), p = 0.039), development of new tumours (13% vs 3%, OR=5.16 (95% CI 2.06 to 12.87), p = 0.001) and/or development of bilateral disease (9% vs 2%, OR=4.98 (95% CI 1.70 to 14.65), p = 0.004)., Conclusions: Among patients with solitary unilateral retinoblastoma, those presenting with macular tumour (compared with extramacular tumour) show 2.18 times greater likelihood for germline mutation and an even higher likelihood of development of subsequent tumours. Solitary macular retinoblastoma should raise an index of suspicion for likely germline mutation and multifocal disease., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.)

In this review we discuss several recent concepts regarding retinoblastoma control and its impact. In a cohort of 482 patients with solitary unilateral retinoblastoma revealed germline mutation in 16% and the likelihood of germline retinoblastoma was greater for younger children (≤1 year versus (vs.) >1 year at presentation) with odds ratio (OR) 2.96 (p = 0.001), and greatest for the youngest infants (≤3 months vs. >3-12 months) (OR 5.52) (p = 0.002). Retinocytoma/retinoma, a benign variant of retinoblastoma, was studied in 78 tumours and demonstrated transformation into retinoblastoma in 9.2% by 5 years and 15.3% by 10 years and 20 years. An international global study on retinoblastoma over 1.5 years revealed 4351 new patients and 85% from low- and middle-income countries, notably with older age at detection and greater risk for metastasis. Management of retinoblastoma in 964 eyes using intravenous chemotherapy showed 20-year globe salvage at 96% in group A, 90% in group B, 90% in group C, 68% in group D, and 32% in group E eyes. The 5-year globe salvage with intra-arterial chemotherapy for 160 eyes (655 infusions) with retinoblastoma showed success in 100% for group B, 80% for group C, 78% for group D, and 55% for group E. The psychological impact of retinoblastoma on the parents revealed depression (73%), anxiety (64%), and/or stress (100%), and on the patient revealed deficits in quality of life issues. Retinoblastoma is a challenging disease and chemotherapy provides reliable tumour control and globe salvage. Continuing efforts to improve quality of life issues is important., (© 2022. The Author(s), under exclusive licence to The Royal College of Ophthalmologists.)

Purpose: To evaluate the likelihood of germline retinoblastoma in patients presenting with solitary unilateral retinoblastoma, based on age at presentation., Methods: This retrospective case series of 482 consecutive patients presenting with solitary unilateral retinoblastoma analyzed the likelihood of germline retinoblastoma, defined as family history of retinoblastoma, germline retinoblastoma mutation documented on genetic testing, and/or development of bilateral disease and/or additional new tumors. This analysis was based on age at presentation (0 to 12 months vs older than 12 to 24 months vs older than 24 to 36 months vs older than 36 months) and a sub-study was conducted on infant age at presentation (0 to 3 months vs older than 3 to 6 months vs older than 6 to 9 months vs older than 9 to 12 months)., Results: Of the overall group (482 consecutive patients) with solitary unilateral retinoblastoma, there were significantly different findings in the youngest age group (0 to 12 months old) with greater family history of retinoblastoma (10% vs 2% vs 1% vs 2%, P = .004), smaller median basal diameter (18.0 vs 20.0 vs 20.0 vs 20.0 mm, P = .014), smaller median tumor thickness (8.7 vs 10.0 vs 11.5 vs 10.0 mm, P = .002), greater macular tumor location (33% vs 16% vs 10% vs 8%, P < .001), and greatest likelihood of germline mutation (29% vs 17% vs 8% vs 9%, P = .001). By comparison, patients 1 year and younger (vs older than 1 year) demonstrated a 2.96 odds ratio (OR) ( P = .001) for likelihood of germline retinoblastoma. For those classified as infants (1 year and younger) (n = 132 consecutive patients), the youngest patients (0 to 3 months old) demonstrated the greatest likelihood for germline mutation (61% vs 20% vs 24% vs 22%, P = .009) and greatest odds ratio (5.52, P = .002) compared to patients older than 3 to 12 months., Conclusions: The youngest patients with solitary unilateral retinoblastoma showed the greatest likelihood of germline disease when evaluating all patients (1 year and younger vs older than 1 year of age) (OR = 2.96) and the substudy of infants (3 years and younger vs older than 3 to 12 months old) (OR = 5.52). [ J Pediatr Ophthalmol Strabismus . 2021;58(6):355-364.] .

Purpose: To evaluate tumor control and globe salvage following intra-arterial chemotherapy (IAC) for retinoblastoma based on International Classification of Retinoblastoma (ICRB) and patient demographics., Methods: The medical records of 313 patients (341 eyes) treated with IAC were reviewed retrospectively. Chemotherapy agents included melphalan, topotecan, and carboplatin. Comparative analysis was performed for tumor control and globe salvage based on ICRB and patient demographics including age (≤12 vs >12 months), race (white vs nonwhite), and sex., Results: Of the 341 eyes treated with 1,292 consecutive infusions of IAC as primary or secondary therapy for retinoblastoma, Kaplan-Meier 5-year estimates of globe salvage was 74%. Of those treated with IAC as primary therapy (n = 160 eyes; 655 infusions), 5-year globe salvage overall was 76%: and more specifically, 100% for groups B and C, 86% for group D, and 55% for group E. Of those treated with IAC as secondary therapy (n = 207 eyes; 859 infusions), 5-year globe salvage was 71%. Comparative analysis by race and sex demonstrated no differences in outcomes, but analysis by age revealed that younger patients had a higher rate of globe salvage (77% vs 72%; P < 0.001). Complications (per catheterization) included retina ischemia (1%), choroidal ischemia (1%), neovascularization of the disk, retina, iris (NVI), glaucoma (about 1% each), and central/peripheral systemic ischemia (<1%). Younger patients showed less NVI (P = 0.028), white patients showed less retinal ischemia (P = 0.037), and no difference by sex. There were no patients with metastatic disease or death., Conclusions: Our results suggest that IAC provides substantial tumor control for advanced and/or recurrent retinoblastoma with a high rate of globe salvage and few complications. There was little difference in outcomes per age, race, and sex., (Copyright © 2021 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved.)

Background: Intravenous chemotherapy (IVC) remains an important globe salvage therapy for retinoblastoma., Methods: Evaluation of long-term globe salvage at 5, 10, 15 and 20 years following frontline IVC for retinoblastoma., Results: Of 994 eyes, comparison by International Classification of Retinoblastoma group (A vs B vs C vs D vs E) revealed more advanced group with older mean age at presentation (8 vs 7 vs 10 vs 11 vs 15 months, p<0.001). By clinical features, more advanced group demonstrated greater mean tumour diameter (3.2 vs 6.8 vs 9.4 vs 14.3 vs 16.4, p<0.001) and thickness (2.0 vs 3.7 vs 4.4 vs 7.3 vs 9.3, p<0.001), and greater frequency of vitreous seeds ≥1 quadrant (0% vs 0% vs 44% vs 42% vs 57%, p<0.001) and subretinal seeds (0% vs 0% vs 22% vs 65% vs 54%, p<0.001). By outcomes, less advanced group demonstrated greater tumour control (without need for enucleation or external beam radiotherapy (EBRT)) by year 2 (96% vs 91% vs 91% vs 71% vs 32%, p<0.001), and with minimal change up to 20 years. In order to achieve globe salvage, additional intra-arterial chemotherapy (IAC) or plaque radiotherapy was employed by year 2 (5% vs 26% vs 28% vs 27% vs 19%, p<0.001), with little further need up to 20 years. Pinealoblastoma (2%), metastasis (2%) and death (1%) were infrequent., Conclusion: Frontline IVC (plus additional IAC and/or plaque radiotherapy) for retinoblastoma provided complete tumour control for groups A (96%), B (91%), C (91%), D (71%) and E (32%), avoiding enucleation or EBRT and was lasting for up to 20 years., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2020. No commercial re-use. See rights and permissions. Published by BMJ.)

Intravitreal chemotherapy is recognized as an effective treatment for retinoblastoma with vitreous (and occasionally subretinal) seeding refractory to intravenous or intra-arterial chemotherapy. However, this treatment carries with it the risk of toxicity to both the posterior and anterior segments of the eye, including retinal pigment epithelial mottling, ischemic/hemorrhagic retinopathy, posterior synechia, cataract, scleral necrosis, and focal iris depigmentation. We report 2 cases of iris heterochromia secondary to profound iris stromal depigmentation following intravitreal melphalan and topotecan injections., (Copyright © 2019 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved.)

Purpose: To describe the results of intra-arterial chemotherapy (IAC) for control of persistent or recurrent subretinal seeds (SRS) following previous chemotherapy for retinoblastoma., Methods: We reviewed the medical records of patients with massive persistent or recurrent SRS after intravenous and/or intra-arterial chemotherapy and subsequently treated with superselective ophthalmic artery infusion of melphalan (3, 5, or 7.5 mg) and/or additional topotecan (1 mg) and/or carboplatin (20 or 30 mg) as necessary from January 2009 to March 2014. The main outcome measures were SRS control and globe salvage., Results: A total of 30 eyes of 29 patients were included. Mean patient age was 19 months (median, 14 months; range, 2-58 months). Previous treatments included intravenous chemotherapy (n = 28) and intra-arterial chemotherapy (n = 5). The SRS occupied a median of 6 clock hours. Retinal detachment was present in 5 eyes (17%). Each eye received a mean of 3 IAC sessions (median, 2; range, 1-7) on a monthly basis. After a mean follow-up of 24 months (median, 18; range, 1-71 months), 27 of eyes (90%) demonstrated complete SRS regression. Overall, globe salvage was achieved in 15 eyes (50%). Fifteen eyes were enucleated because of recurrent SRS (4 eyes), recurrent SRS and vitreous seeds (3 eyes), recurrent solid tumor (1 eye), and neovascular glaucoma from total retinal detachment and/or vitreous hemorrhage (7 eyes), none of which had active tumor., Conclusions: IAC can be an effective second- or third-line therapy in the management of massive persistent or recurrent SRS from retinoblastoma following previous chemotherapy. All eyes in this study were all facing enucleation; lasting seed control was achieved in 70%., (Copyright © 2016 American Association for Pediatric Ophthalmology and Strabismus. Published by Elsevier Inc. All rights reserved.)

Purpose: Diffuse anterior retinoblastoma is an exquisitely rare variant of retinoblastoma in which the tumor resides in the anterior segment of the eye, without apparent retinal involvement. Previously published cases have been managed with enucleation. We describe globe salvage and visual preservation in 3 consecutive cases using chemotherapy and radiotherapy., Design: Retrospective case series., Participants: Three children with diffuse anterior retinoblastoma., Methods: Plaque radiotherapy plus intravenous chemotherapy., Main Outcome Measures: Globe and vision preservation., Results: The mean patient age at presentation elsewhere was 5.7 years (median, 7; range, 3-7 years). There were 2 white female patients and 1 African American male patient. The initial observation by parents/caregiver was reduced vision (n = 1), red eye (n = 1), or cloudy eye (n = 1), and the initial finding by physician was iris tumor (n = 2) or hyphema (n = 1). Referring diagnosis was iris melanoma (n = 1), infectious endotheliitis (n = 1), and possible tumor (nonspecified) (n = 1). At our evaluation, visual acuity was 20/50 to 20/60 (n = 2) and fix no follow (n = 1). In all cases, the opposite eye was normal. Mean intraocular pressure was 20 mm Hg (median, 16; range, 15-30 mmHg). Our examination revealed solid iris tumor (n = 3), ciliary body involvement (n = 2), and anterior chamber seeding (n = 3). In no case was there choroidal or retinal tumor, vitreous seed or subretinal seed, or extrascleral extension. Clear corneal fine-needle aspiration biopsy confirmed the diagnosis as retinoblastoma in each case. Treatment included plaque radiotherapy (n = 3) plus additional systemic chemotherapy (n = 2). At mean follow-up of 35 months (median, 34; range, 20-51 months), there has been no recurrence, extrascleral extension, enucleation, metastasis, or death. In all 3 cases, cataract surgery was necessary at a mean interval of 16 months after complete and stable regression of retinoblastoma., Conclusions: The rare diffuse anterior form of retinoblastoma can be managed with globe-salvaging alternatives and with visual preservation in selected cases., (Copyright © 2016 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.)

Purpose of Review: The management of retinoblastoma is complex and involves strategically chosen methods of enucleation, radiotherapy, chemotherapy, laser photocoagulation, thermotherapy, and cryotherapy. Chemotherapy has become the most common eye-sparing modality. There are four routes of delivery of chemotherapy for retinoblastoma, including intravenous, intra-arterial, periocular, and intravitreal techniques. The purpose of this review is to discuss the current rationale for each method and the anticipated outcomes., Recent Findings: The diagnosis of retinoblastoma should be clinically established prior to embarking on a chemotherapy protocol. There are over 25 conditions that can closely simulate retinoblastoma in a young child. In addition, enucleation is an acceptable method for management, particularly with advanced retinoblastoma. Intravenous chemotherapy is generally used for germline mutation (bilateral, familial) retinoblastoma with excellent tumor control for groups A, B, and C and intermediate control for group D eyes. Intra-arterial chemotherapy is used as primary therapy in selected cases for nongermline mutation (unilateral) retinoblastoma with excellent control, and also used as secondary therapy for recurrent solid retinoblastoma, subretinal seeds, and vitreous seeds. Periocular chemotherapy is employed to boost local chemotherapy dose in advanced bilateral groups D and E eyes or for localized recurrences. Intravitreal chemotherapy is used for recurrent vitreous seeds from retinoblastoma. Patients at high risk for metastases should receive intravenous chemotherapy., Summary: Chemotherapy is effective for retinoblastoma and the targeted treatment route depends on the clinical features and anticipated outcomes.

Objective: To analyze our 5-year experience of intra-arterial chemotherapy (IAC) for retinoblastoma as primary or secondary therapy., Design: Retrospective interventional case series., Participants: A total of 70 eyes of 67 patients., Intervention: Ophthalmic artery chemotherapy infusion under fluoroscopic guidance was performed using melphalan (3, 5, or 7.5 mg) in every case, with additional topotecan (1 mg) and/or carboplatin (30 or 50 mg) as necessary., Main Outcome Measures: Tumor control and treatment complications., Results: The mean patient age at IAC was 30 months. The treatment was primary in 36 eyes and secondary in 34 eyes. Those primary therapy eyes were classified according to the International Classification of Retinoblastoma (ICRB) as group A (n = 0), B (n = 1), C (n = 4), D (n = 17), or E (n = 14). The secondary therapy eyes had failed previous intravenous chemotherapy (n = 34) in every case. Each eye received a mean of 3 IAC sessions per eye (median, 3; range, 1-7 sessions). After IAC with a mean follow-up of 19 months, globe salvage was achieved in 72% of primary-treated cases and in 62% of secondary-treated cases. Specifically, primary therapy achieved globe salvage for group B (100%), group C (100%), group D (94%), and group E (36%). Of all 70 eyes, complete regression was achieved for solid tumor in 48 of 51 eyes (94%), subretinal seeds in 40 of 42 eyes (95%), and vitreous seeds in 34 of 39 eyes (87%). After each catheterization (n = 198), the main complications included transient eyelid edema (5%), blepharoptosis (5%), and forehead hyperemia (2%). More lasting complications included vitreous hemorrhage (2%), branch retinal artery obstruction (1%), ophthalmic artery spasm with reperfusion (2%), ophthalmic artery obstruction (2%), partial choroidal ischemia (2%), and optic neuropathy (<1%). Over the past 3 years, the combined incidence of ophthalmic, retinal, and choroidal vascular ischemia was reduced to 1%. There was no patient with stroke, seizure, neurologic impairment, limb ischemia, secondary leukemia, metastasis, or death., Conclusions: Five-year experience with IAC indicates that this technique is remarkably effective for the management of retinoblastoma as both a primary and a secondary treatment., (Copyright © 2014 American Academy of Ophthalmology. Published by Elsevier Inc. All rights reserved.)

Importance: Recurrent or persistent vitreous seeds following treatment of retinoblastoma poses difficult management and often leads to enucleation., Objective: To describe the technique and evaluate the efficacy and complications of intravitreal melphalan for vitreous seeding from retinoblastoma., Design, Setting, and Participants: This retrospective noncomparative analysis was conducted at a tertiary referral center. The study included 11 consecutive eyes of 11 patients with viable persistent or recurrent vitreous seeds following treatment of retinoblastoma., Interventions: All eyes received intravitreal melphalan injection (20-30 µg) by transconjunctival pars plana route with concomitant triple-freeze cryotherapy at the injection site during needle withdrawal for prevention of extraocular seeding. Each patient was offered planned 6 monthly cycles., Main Outcomes and Measures: Vitreous seed control and complications of therapy., Results: The mean patient age at vitreous injection was 37 months (median, 27 months; range, 16-82 months). Viable vitreous seeds involved 2 (n = 1), 3 (n = 4), or 4 (n = 6) quadrants. The solid intraretinal retinoblastoma and subretinal seeds showed regression in all eyes following intravenous chemotherapy (n = 6) or intra-arterial chemotherapy (n = 5). There were a total of 55 injections, with a mean number per patient of 5 (median, 6; range, 2-6). Fewer than 6 injections (n = 5) were delivered owing to complete vitreous seed control and parental desire to avoid more injections. By a mean of 9 months' follow-up (median, 9 months; range, 6-16 months), therapeutic success with complete vitreous seed regression was achieved in all 11 cases (100%). Globe salvage was attained in all cases (100%). Further vitreous seed development did not occur in any case. Complications included focal retinal pigment epithelial mottling near the site of chemotherapy injection (2 eyes) and nonaxial posterior lens opacity (2 eyes). There was no case of extraocular tumor extension, hypotony, or phthisis bulbi., Conclusions and Relevance: These preliminary short-term results suggest that intravitreal melphalan injection for persistent or recurrent vitreous retinoblastoma seeding can provide tumor control with minimal toxicity and complications.

Objective: To describe tumor control following intra-arterial chemotherapy (IAC) for retinoblastoma., Methods: A retrospective interventional series in which 17 patients were treated with ophthalmic artery injection of melphalan, 5 mg, was undertaken to determine retinoblastoma control., Results: Of 190 children with retinoblastoma, 17 (9%) were treated with IAC. Catheterization was successful in 37 of 38 attempts. The treatment was primary in 13 cases (1 failed catheterization) and secondary in 4. The median retinoblastoma base was 20 mm and the median retinoblastoma thickness was 9.0 mm. Iris neovascularization was present in 5 cases. Following IAC, complete response of the main tumor was found in 14 cases (88%) and partial response was found in 2 (12%). Eyes with complete response and followed up for a minimum of 1 year (n = 10) showed no solid tumor recurrence. Of 11 eyes with subretinal seeds, 9 (82%) had complete response, 1 (9%) had partial response, and 1 (9%) had recurrence. Of 9 eyes with vitreous seeds, 6 (67%) had complete response, 2 (22%) had partial response, and 1 (11%) had recurrence. Globe salvage was achieved in 8 of 12 eyes (67%) treated with primary IAC, including 2 of 2 group C eyes, 4 of 4 group D eyes, and 2 of 6 group E eyes according to the International Classification of Retinoblastoma. Globe salvage was achieved in 2 of 4 eyes (50%) treated secondarily after failure of other methods., Conclusions: Of 12 eyes managed with IAC as primary treatment, globe salvage was achieved in 67%. Eyes classified as group C or D showed 100% globe salvage, whereas group E had 33% salvage. Of 4 eyes managed with IAC as secondary treatment, globe salvage was achieved in 50%.