A one year old child having leukocoria was detected to be having a unilateral, large retinoblastoma filling half the globe. Current therapy would involve –
First, I need to recall the management of retinoblastoma. Retinoblastoma is a pediatric eye tumor, typically in children under 5. The treatment depends on the stage and whether it's unilateral or bilateral. Since this is a unilateral case with the tumor filling half the globe, it's likely a more advanced stage.
The options aren't provided, but based on common treatments, the possible answers could be enucleation, chemotherapy, radiation, or something else. The key here is the size of the tumor. If it's large and filling half the globe, the standard approach might be enucleation to prevent spread and preserve vision if possible. However, sometimes chemotherapy is used first to shrink the tumor before enucleation.
Wait, but in some cases, especially if the tumor is very large and vision is already lost, enucleation might be the primary treatment. Also, considering the child's age, preserving the eye might not be feasible if the tumor is too big. So enucleation would be the correct answer here. The other options like chemotherapy or radiation might be used in smaller tumors or to preserve the eye in bilateral cases. But for a large unilateral tumor, enucleation is the standard approach.
I should also remember that retinoblastoma can spread via the optic nerve or bloodstream, so timely treatment is crucial. Enucleation removes the eye and the tumor, preventing metastasis. So the correct answer is probably enucleation. Let me check if there are other options like focal therapies, but for a large tumor, those might not be sufficient. Therefore, the answer is enucleation.
**Core Concept**
Retinoblastoma management depends on tumor size, laterality, and vision potential. A unilateral, large tumor filling half the globe typically requires enucleation to prevent metastasis and preserve life.
**Why the Correct Answer is Right**
Enucleation is the standard treatment for advanced unilateral retinoblastoma (>30% globe involvement) with no viable vision. This removes the tumor, prevents optic nerve invasion, and reduces metastatic risk. Postoperative adjuvant therapies (e.g., chemotherapy) may follow, but primary therapy is surgical.
**Why Each Wrong Option is Incorrect**
**Option A:** Chemotherapy alone is insufficient for large tumors; it’s used for smaller, vision-sparing cases.
**Option B:** Radiation therapy (e.g., external beam) is avoided in children 30% globe involvement, **enucleation is the definitive treatment**. Never delay surgery for vision salvage in advanced cases.
**Correct Answer: A. Enucleation**