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Retinoblastoma in the first year of life
1Department of Ophthalmology, New-York Hospital-Cornell Medical Center, New York 10021.
Insights
Infants diagnosed with retinoblastoma (a rare eye cancer) show distinct characteristics and treatment responses. Early treatment in the first year of life increases the risk of secondary nonocular tumors due to genetic predisposition and radiation.
Area of Science:
- Pediatric Oncology
- Ophthalmology
- Genetics
Background:
- Retinoblastoma is the most common primary intraocular malignancy in children.
- Infants diagnosed with retinoblastoma exhibit unique clinical presentations and disease progression compared to older children.
- Understanding these early-life differences is crucial for timely diagnosis and effective management.
Purpose of the Study:
- To delineate the specific characteristics of retinoblastoma diagnosed within the first year of life.
- To compare clinical presentation, diagnostic stage, and outcomes in infants versus older children.
- To identify risk factors associated with treatment and secondary tumor development in this cohort.
Main Methods:
- Retrospective analysis of retinoblastoma cases diagnosed between 1958 and 1983.
- Data collection on laterality, diagnostic stage (Group V), sex distribution, and presenting signs (family history vs. leukocoria).
- Evaluation of treatment protocols and the incidence of second nonocular tumors.
Main Results:
- Of 401 infants diagnosed, 280 had bilateral and 121 had unilateral retinoblastoma.
- Group V was the most common diagnostic stage for both unilateral and bilateral cases.
- Infants examined within the first three months were more likely diagnosed due to family history than leukocoria.
- Early treatment in the first year of life correlated with a higher incidence of second nonocular tumors, linked to germinal mutations and radiation therapy.
Conclusions:
- Infants with retinoblastoma present with distinct epidemiological and clinical features.
- Early diagnosis and treatment in infancy, while critical, are associated with an elevated risk of secondary malignancies.
- Genetic factors and therapeutic radiation play a significant role in the development of these secondary tumors.
Abstract:
Children diagnosed with retinoblastoma in the first year of life present with differences in laterality, stage, signs, symptoms, and respond differently to treatments when compared to older children. Of those children diagnosed in the first year of life (between 1958 and 1983 inclusive), 280 were bilateral and 121 were unilateral, the most common stage of diagnosis (for unilateral and bilateral) was Group V, and children were affected equally by sex. Children examined in the first three months of life were more often seen because of a positive family history of retinoblastoma, rather than leukocoria. Children who were treated in the first year of life frequently develop second nonocular tumors because they harbor the germinal mutation and receive radiation.