Retinoblastoma
Cancer of the developing retina; the most common eye cancer in children.
Primary risk age: Mostly children under 5 years, including infants.
- Urgency
- Emergency
- Typical age
- Mostly children under 5 years, including infants.
- Body system
- Oncological System
Typical course: Treatment spans months and is followed by years of monitoring for recurrence and for new tumors in inherited cases.
Reviewed against AAP · CDC · WHO · NHS guidance Last reviewed 2026-06-13
1. Summary & Pathophysiology
Cancer of the developing retina; the most common eye cancer in children.
Pathophysiology (Development Path)
Loss of a tumor-suppressor gene lets immature retinal cells grow uncontrolled, forming a tumor that can threaten vision and, if untreated, spread beyond the eye.
Primary Causes & Etiology
Mutations in the RB1 gene; some cases are inherited and affect both eyes, while others arise by chance in one eye.
2. Symptom Continuum
- Early Onset Signs
A white reflection in the pupil instead of the normal red reflex, often first noticed in flash photographs.
- Progressive Phase
A new squint (misaligned eye), a change in eye color or appearance, a red or irritated eye, or reduced vision.
- Severe Indicators
A bulging or very painful eye, or signs of spread beyond the eye, indicate advanced disease requiring urgent specialist care.
3. Clinical Verification
Urgent examination of the eye under anesthesia by a specialist, with imaging such as ultrasound or MRI; genetic testing guides care and family screening.
4. Care & Elements Plan
Primary Care Treatment Plan
Individualized treatment by a specialist team may include chemotherapy, focal therapies (laser or freezing), local treatments, and, for advanced disease, removal of the eye to save the child’s life.
Home Support Elements
There is no home treatment; the priority is urgent specialist referral. Families benefit from genetic counseling and screening of siblings when an inherited form is found.
Generic Active Ingredients (No Brands)
- Chemotherapy agents (specialist cancer treatment to shrink tumors)
- focal therapies such as laser or cryotherapy (eye-preserving procedures)
- enucleation (surgical removal of the eye for advanced disease).
Lists active elements only. Never administer self-designed therapies.
5. Doctor Critical Lines
Critical Thresholds: When to See a Doctor
See a doctor urgently for any white reflection in a child’s pupil, a new squint, a change in the eye’s appearance, or loss of the normal red reflex in photos.
6. Vaccine & Prevention
Routine Prophylaxis (Prevention)
Inherited cases cannot be prevented, but newborn red-reflex checks, family screening, and genetic counseling allow early detection that saves sight and lives.
Immunization Context
No vaccine is relevant to retinoblastoma.
7. Timelines & Outlook
Active Timeline
Treatment spans months and is followed by years of monitoring for recurrence and for new tumors in inherited cases.
Expected Prognosis
Excellent survival when caught early in countries with prompt treatment; outcomes are far worse when diagnosis is delayed.
Potential Untreated Complications
Vision loss, loss of the eye, spread beyond the eye if untreated, and a higher lifetime risk of other cancers in inherited forms.
More in Solid Organ Embryonal Tumors
Severe Neuroblastoma
Malignant Embryonal Tumor of the Sympathetic Nervous System
Infants and toddlers (Median age of diagnosis is 19 months; most common solid extracranial tumor in children)
Severe Nephroblastoma (Wilms Tumor)
Malignant Embryonal Renal Tumor
2 to 5 Years (Peak occurrence; rare after 8 years)