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What Is Retinoblastoma?

Retinoblastoma is a malignant tumor of the developing retina that occurs mainly in infants and young children. It arises from mutations in the RB1 tumor suppressor gene and can be hereditary or nonhereditary. Parents often notice a white reflex in the pupil on photographs or in dim light, or see a wandering eye. Without treatment, the tumor can fill the eye, spread along the optic nerve, or metastasize, which can be life threatening. Modern therapy has greatly improved survival and eye preservation in many cases.

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What Is Retinoblastoma?

Retinoblastoma is a malignant tumor of the developing retina that occurs mainly in infants and young children. It arises from mutations in the RB1 tumor suppressor gene and can be hereditary or nonhereditary. Parents often notice a white reflex in the pupil on photographs or in dim light, or see a wandering eye. Without treatment, the tumor can fill the eye, spread along the optic nerve, or metastasize, which can be life threatening. Modern therapy has greatly improved survival and eye preservation in many cases.

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Clinical Presentation and Signs

Leukocoria, a white pupillary reflex, is the classic sign and often appears in flash photos as a white instead of red reflex. Strabismus is another common early clue when one eye sees poorly. Advanced tumors can cause a red, painful eye, glaucoma, or buphthalmos. Bilateral involvement is more common in hereditary cases, while unilateral tumors are often sporadic. Family history of retinoblastoma or early onset sarcomas raises concern for a germline mutation.

Diagnosis and Staging

Diagnosis relies on detailed dilated fundus examination under anesthesia in young children, combined with ultrasound and imaging. Retinoblastoma appears as a creamy mass that may show calcification and subretinal or vitreous seeding. MRI of brain and orbits evaluates optic nerve extension and intracranial disease. Staging systems describe whether the eye can be saved, whether both eyes are involved, and whether there is extraocular spread. Genetic testing for RB1 mutations guides counseling about hereditary risk and surveillance of siblings.

Treatment Options

Treatment aims to save the child's life first, then the eye, and then vision. Options include systemic or intra arterial chemotherapy, focal treatments such as laser photocoagulation and cryotherapy, and intravitreal chemotherapy for vitreous seeds. External beam radiotherapy is used less often because of late effects. When an eye is blind with advanced tumor or high risk of spread, enucleation is performed with careful pathologic assessment of the optic nerve and sclera. Survivors of hereditary retinoblastoma need lifelong monitoring for second malignancies.

Prognosis and Follow-Up

With early diagnosis and modern care, survival rates in high resource settings are very high, although outcomes are poorer where access is limited. Many children retain at least one seeing eye, and some keep good vision in an affected eye. Late effects include cosmetic issues, orbital growth changes, and risk of secondary cancers, especially after radiation. Regular follow up visits track tumor control, monitor for recurrence, and support visual development. Psychosocial support for the family is also important.

FAQs About Retinoblastoma

Is retinoblastoma inherited?

About half of cases involve a germline RB1 mutation that can be passed to children, while the rest are nonhereditary.

Does a white reflex in every photo mean cancer?

No, artifacts and benign conditions can cause similar findings, but any persistent white reflex needs urgent eye examination.

Can both eyes be saved in bilateral retinoblastoma?

Many children keep at least one eye and sometimes both, depending on tumor size, location, and response to therapy.

Will my child need eye checks after treatment ends?

Yes, long term follow up monitors for recurrence, visual development, and later health risks.

References

National Cancer Institute. ?Retinoblastoma.? https://www.cancer.gov/types/retinoblastoma

EyeWiki. ?Retinoblastoma.? https://eyewiki.org/Retinoblastoma

NCBI Bookshelf (StatPearls). ?Retinoblastoma.? https://www.ncbi.nlm.nih.gov/books/NBK507806/

NCBI GeneReviews. ?Retinoblastoma.? https://www.ncbi.nlm.nih.gov/books/NBK1452/

MedlinePlus Genetics. ?Retinoblastoma.? https://medlineplus.gov/genetics/condition/retinoblastoma/