Ewing's sarcoma as second malignant neoplasm after retinoblastoma: a case report

Area of Science:

• Pediatric Oncology
• Ophthalmology
• Genetics

Background:

• Hereditary retinoblastoma (RB) is a rare childhood cancer with a known association with an increased risk of second malignant neoplasms (SMNs).
• Early detection and management of RB are crucial for patient survival and long-term health outcomes.
• Understanding the spectrum of SMNs in hereditary RB patients informs surveillance strategies.

Observation:

• A case report details a child diagnosed with hereditary unilateral retinoblastoma (RB) at 9 months of age, initially presenting with locally advanced disease and bone marrow involvement.
• Despite initial treatment refusal, the patient underwent chemotherapy, laser therapy, and eventual enucleation of the affected eye due to relapse.
• Three years post-enucleation, the child developed Ewing's sarcoma of the right fibula, successfully treated with chemotherapy, surgery, and stem cell transplantation.

Findings:

• This case underscores the significant risk of developing secondary malignancies, specifically Ewing's sarcoma, in individuals with a history of hereditary retinoblastoma.
• The temporal association between retinoblastoma treatment and the subsequent development of Ewing's sarcoma suggests a potential link, possibly related to genetic predisposition or prior treatments.
• The successful multidisciplinary management of both retinoblastoma and Ewing's sarcoma highlights the importance of comprehensive care for these complex cases.

Implications:

• Children diagnosed with hereditary retinoblastoma require lifelong, intensive surveillance for the early identification of SMNs.
• Genetic counseling and family screening are essential for identifying at-risk individuals and implementing preventative measures.
• Further research into the specific genetic pathways and environmental factors contributing to SMNs in hereditary RB may lead to improved risk stratification and targeted therapies.