Skip to content
How It Works
Explore
Resources Ask a Question
Who It's For
Patients
Decode results, prep for appointments, weigh options.
Caregivers & advocates
Carry the research load for someone you love.
Providers & clinicians
Resources for patients in your practice.
Log In Ask a Question
PubMed This is a summary of 15 peer-reviewed journal articles Updated
Oncology · Retinoblastoma

Retinoblastoma Risk and Screening Protocols

At a Glance

Children with Ring 13 syndrome who have a 13q14.2 deletion are at high risk for retinoblastoma due to a missing RB1 gene. Strict screening protocols, including frequent eye exams under anesthesia and brain MRIs, are critical in the first few years of life to catch and treat tumors early.

If your child’s Ring 13 diagnosis involves a deletion at the 13q14.2 region, the most critical medical priority is screening for retinoblastoma [1]. This is a rare form of eye cancer that develops in the retina (the light-sensing tissue at the back of the eye). It occurs because the RB1 gene—which normally acts as a “brake” to prevent tumors—is missing or damaged [2][3].

While this sounds frightening, modern screening protocols are designed to catch these tumors early when they are highly treatable and the eye can often be saved [4][5].

Why Screening is Intensive

Because children with Ring 13 are missing the RB1 gene in their baseline cells, oncologists refer to this as a heritable or constitutional risk [5]. This does not mean you passed the condition to your child—it is still a new genetic accident. However, because the mutation is in their baseline cells, tumors can develop in one or both eyes, often starting very early in life, and they could theoretically pass the trait to their future children [4].

  • Frequent Exams: In the first year of life, your child may need eye exams every 3 to 4 weeks [4].
  • Examination Under Anesthesia (EUA): Because infants cannot sit still for the detailed look required to find tiny tumors, these exams are often done under light anesthesia [6]. While the idea of frequent anesthesia is frightening, these procedures are brief and managed by specialized pediatric anesthesia teams who do this routinely [7].
  • Early Detection: The goal is to find “seeds” or small tumors before they grow, allowing for localized treatments like lasers or specialized chemotherapy [4][8].

Monitoring Beyond the Eyes: Pineoblastoma

In rare cases (estimated at less than 5%), children with RB1 deletions can develop a similar type of tumor in the pineal gland of the brain, a condition sometimes called “trilateral retinoblastoma” [9][10].

  • Brain MRI: Doctors typically recommend a baseline brain MRI at the time of diagnosis [11].
  • Surveillance: Regular MRIs (often every 6 months for the first few years) are used to monitor the brain’s midline for any changes [8][11].

How Long Does Screening Last?

The risk for retinoblastoma is highest in the first few years of life while the retina is still growing [4].

  • Age 4 to 7: For many children, the frequency of intense eye exams begins to decrease after age 3 or 4. Some protocols suggest that if no tumors have formed by age 7, the risk of new tumors significantly drops [12].
  • Long-Term: While the risk of the original retinoblastoma fades, individuals with RB1 deletions remain at a higher risk for other types of tumors later in life, specifically osteosarcomas (bone cancer) and soft tissue sarcomas [13][14]. They should stay connected with an oncology team for lifelong monitoring.

Signs to Watch For at Home

While you follow your doctor’s screening schedule, you should also watch for these physical signs:

  1. Leukocoria: A white “glow” or reflection in the pupil, often most noticeable in flash photography or dim light [15].
  2. Strabismus: One eye that seems to “drift” or look in a different direction than the other.
  3. Redness or Swelling: Persistent eye redness that does not look like a typical infection.

If you notice any of these signs, contact your pediatric ophthalmologist immediately, even if your next scheduled exam is weeks away.

Common questions in this guide

Why does Ring 13 syndrome increase the risk of retinoblastoma?
If your child's Ring 13 diagnosis involves a deletion at the 13q14.2 region, they may be missing the RB1 gene. This gene normally acts as a brake to prevent tumors, and its absence increases the risk of developing this rare eye cancer.
What is an Examination Under Anesthesia (EUA) and why is it necessary?
An EUA is a brief eye exam performed under light anesthesia. Because infants cannot sit still for the detailed look required to find tiny tumors, this allows specialized doctors to thoroughly examine the retina and catch tumors early.
How long will my child need intense retinoblastoma screening?
The risk for retinoblastoma is highest in the first few years of life. By age 3 or 4, the frequency of intense eye exams usually decreases, and the risk of new eye tumors significantly drops if none have formed by age 7.
What is pineoblastoma and how is it monitored?
Pineoblastoma is a rare brain tumor that can occur in a small percentage of children with RB1 gene deletions. Doctors monitor for this condition using regular brain MRIs, typically every six months during the first few years of life.
What physical signs of eye tumors should I watch for at home?
Parents should watch for a white glow in the pupil (leukocoria), which is often visible in flash photos or dim light. Other warning signs include an eye that drifts or crosses, and persistent eye redness or swelling that does not look like a typical infection.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Does my child’s specific 13q breakpoint definitively include the RB1 gene, and how does this affect their risk level?
  2. 2.What is the specific schedule for Eye Examinations Under Anesthesia (EUA) that you recommend for my child?
  3. 3.How often should we perform MRI screenings to monitor for pineoblastoma, and at what age can we safely stop these scans?
  4. 4.Are there newer imaging technologies, like wide-field fundus imaging, that could help us reduce the number of times my child needs general anesthesia?
  5. 5.If a tumor is detected, what specialized treatments (like ophthalmic artery chemosurgery) are available at this center?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (15)
  1. 1

    13q deletion syndrome resulting from balanced chromosomal rearrangement in father: the significance of parental karyotyping.

    Dittner-Moormann S, Reschke M, Biewald E, et al.

    Molecular cytogenetics 2020; (13()):31 doi:10.1186/s13039-020-00500-7.

    PMID: 32760450
  2. 2

    Retinoblastoma and mosaic 13q deletion: a case report.

    Gargallo P, Oltra S, Balaguer J, et al.

    International journal of retina and vitreous 2021; (7(1)):50 doi:10.1186/s40942-021-00321-9.

    PMID: 34479642
  3. 3

    Case report: Genetic diagnoses in a pediatric patient with retinoblastoma and comorbid global developmental delay: three distinct entities diagnosed by whole exome sequencing in a single patient.

    Chen J, Yang S, Wang H, et al.

    Frontiers in neuroscience 2024; (18()):1391596 doi:10.3389/fnins.2024.1391596.

    PMID: 39108315
  4. 4

    Retinoblastoma and Neuroblastoma Predisposition and Surveillance.

    Kamihara J, Bourdeaut F, Foulkes WD, et al.

    Clinical cancer research : an official journal of the American Association for Cancer Research 2017; (23(13)):e98-e106 doi:10.1158/1078-0432.CCR-17-0652.

    PMID: 28674118
  5. 5

    Genetics of Retinoblastoma: An Overview and Significance of Genetic Testing in Clinical Practice.

    Abu-Amero KK, Kondkar AA, Almontashiri NAM, et al.

    Genes 2025; (16(9)) doi:10.3390/genes16091031.

    PMID: 41009976
  6. 6

    Cognition and Anesthesia Exposure in Adolescent and Young Adult Retinoblastoma Survivors.

    Belson PJ, Berry JL, Reid MW, Pike NA

    Paediatric anaesthesia 2026; (36(5)):549-559 doi:10.1002/pan.70152.

    PMID: 41721443
  7. 7

    Number, frequency and time interval of examinations under anesthesia in bilateral retinoblastoma.

    Fabian ID, Shah V, Kapelushnik N, et al.

    Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie 2020; (258(4)):879-886 doi:10.1007/s00417-019-04589-4.

    PMID: 31900643
  8. 8

    Retinoblastoma management in 13q deletion syndrome patients using super-selective chemotherapies and other cancer-directed interventions.

    Cobbs LV, Francis JH, Dunkel IJ, et al.

    Pediatric blood & cancer 2021; (68(5)):e28845 doi:10.1002/pbc.28845.

    PMID: 33355996
  9. 9

    Screening for Pineal Trilateral Retinoblastoma Revisited: A Meta-analysis.

    de Jong MC, Kors WA, Moll AC, et al.

    Ophthalmology 2020; (127(5)):601-607 doi:10.1016/j.ophtha.2019.10.040.

    PMID: 32061409
  10. 10

    Clinical Features and Survival of Chinese Children With Trilateral Retinoblastoma During 2006-2019: A Retrospective Multicenter Study.

    Fang X, Wang Y, Yin J, et al.

    American journal of ophthalmology 2021; (223()):184-192 doi:10.1016/j.ajo.2020.10.002.

    PMID: 33049241
  11. 11

    Follow-up of Cystic Pineal Glands in Retinoblastoma Patients Does Not Increase Detection of Pineal Trilateral Retinoblastoma.

    de Bloeme CM, Jansen RW, de Haan J, et al.

    American journal of ophthalmology 2024; (268()):199-211 doi:10.1016/j.ajo.2024.07.005.

    PMID: 38992673
  12. 12

    Age distribution of retinoblastoma tumours in familial disease.

    Walker JK, Nair D, Mongan AM, et al.

    Eye (London, England) 2025; (39(6)):1093-1098 doi:10.1038/s41433-024-03499-y.

    PMID: 39663399
  13. 13

    Unusually very late-onset new growth of intraocular retinoblastoma: A case report and review of literature.

    Gelaw Y, Shoukry SM, Othman IS

    American journal of ophthalmology case reports 2017; (5()):130-133 doi:10.1016/j.ajoc.2016.12.013.

    PMID: 29503965
  14. 14

    Subsequent Malignant Neoplasms in Retinoblastoma Survivors.

    Fabius AWM, van Hoefen Wijsard M, van Leeuwen FE, Moll AC

    Cancers 2021; (13(6)) doi:10.3390/cancers13061200.

    PMID: 33801943
  15. 15

    An atypical location of pineoblastoma RB1 subgroup without pineal or retinal tumor.

    Guarnizo A, Maldonado F, Baroni L, et al.

    Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery 2024; (40(3)):961-964 doi:10.1007/s00381-023-06201-x.

    PMID: 37917406

This page provides educational information about retinoblastoma screening for children with Ring 13 syndrome. Always consult your pediatric oncologist and ophthalmologist regarding your child's specific screening schedule and medical management.

Get notified when new evidence is published on Ring chromosome 13 syndrome.

We monitor PubMed for new peer-reviewed studies on this topic and email a short summary when something meaningful changes.