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Retinoblastoma

Tumor - retina; Cancer - retina; Eye cancer - retinoblastoma

Retinoblastoma is a rare eye tumor that usually occurs in children. It is a malignant (cancerous) tumor of the part of the eye called the retina.

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Eye

Causes

Retinoblastoma is caused by a mutation in a gene that controls how cells divide. As a result, cells grow out of control and become cancerous.

In about half the cases, this mutation develops in a child whose family has never had eye cancer. In other cases, the mutation occurs in several family members. If the mutation runs in the family, there is a 50% chance that an affected person's children will also have the mutation. These children will therefore have a high risk of developing retinoblastoma themselves.

The cancer most often affects children younger than 7 years old. It is most commonly diagnosed in children 1 to 2 years old.

Symptoms

One or both eyes may be affected.

The pupil of the eye may appear white or have white spots. A white glow in the eye is often seen in photographs taken with a flash. Instead of the typical "red eye" from the flash, the pupil may appear white or distorted.

Other symptoms can include:

If the cancer has spread, bone pain and other symptoms may occur.

Exams and Tests

The health care provider will perform a complete physical exam, including an eye exam. The following tests may be done:

Treatment

Treatment options depend on the size and location of the tumor:

Outlook (Prognosis)

If the cancer has not spread beyond the eye, almost all people can be cured. A cure, however, may require aggressive treatment and even removal of the eye in order to be successful.

If the cancer has spread beyond the eye, the likelihood of a cure is lower and depends on how the tumor has spread.

Possible Complications

Blindness can occur in the affected eye. The tumor can spread to the eye socket through the optic nerve. It may also spread to the brain, lungs, and bones.

When to Contact a Medical Professional

Call your provider if signs or symptoms of retinoblastoma are present, especially if your child's eyes look abnormal or appear abnormal in photographs.

Prevention

Genetic counseling can help families understand the risk for retinoblastoma. It is especially important when more than one family member has had the disease, or if retinoblastoma occurs in both eyes.

Related Information

Tumor
Blindness and vision loss
Proton therapy

References

Cheng KP. Ophthalmology. In: Zitelli BJ, McIntire SC, Nowalk AJ, eds. Zitelli and Davis' Atlas of Pediatric Physical Diagnosis. 7th ed. Philadelphia, PA: Elsevier; 2018:chap 20.

Kim JW, Mansfield NC, Murphree AL. Retinoblastoma. In: Schachat AP, Sadda SR, Hinton DR, Wilkinson CP, Weidemann P, eds. Ryan's Retina. 6th ed. Philadelphia, PA: Elsevier; 2018:chap 132.

Tarek N, Herzog CE. Retinoblastoma. In: Kliegman RM, St Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 529.

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Review Date: 9/24/2019  

Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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