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Uveal Melanoma Symptoms: What to Know, When to Seek Care, and How It’s Managed

What is Uveal Melanoma Symptoms?

Uveal melanoma is the most common primary cancer of the inner eye in adults. It arises from melanocytes—pigment‑producing cells—located in the uveal tract, which includes the iris, ciliary body, and choroid. The disease is rare, accounting for only < 5 % of all melanomas, but it can be aggressive because tumors often grow unnoticed deep within the eye.

“Uveal melanoma symptoms” refers to the visual and ocular changes patients may notice when a melanoma develops in the eye. Because the eye is a closed, fluid‑filled organ, early tumors may cause no pain or discomfort, making awareness of subtle signs essential for timely diagnosis.

Sources: Mayo Clinic; CDC.

Common Causes

Uveal melanoma itself is a malignant tumor, not a symptom of another disease. However, several ocular conditions can mimic or coexist with uveal melanoma, leading to confusion during evaluation. Below are 8–10 common conditions that either present with similar signs or increase the diagnostic challenge:

• Benign choroidal nevus – A pigmented mole in the choroid that can resemble early melanoma.
• Choroidal hemangioma – A vascular tumor that may cause visual disturbances similar to melanoma.
• Pigmented ocular melanoma of the conjunctiva – Arises on the surface of the eye rather than inside the uveal tract.
• Age‑related macular degeneration (AMD) – Can cause floaters and blurred vision, potentially masking early intraocular tumors.
• Retinal detachment – Presents with flashes and floaters, sometimes secondary to a growing melanoma.
• Vitreous hemorrhage – Blood in the gel-like vitreous can obscure the view of an underlying tumor.
• Uveitis (inflammatory eye disease) – Redness and photophobia may be misattributed to inflammation rather than a neoplasm.
• Metastatic cancer to the eye – Other primary cancers (e.g., breast, lung) can spread to the choroid and mimic melanoma.
• Ocular trauma – Injury can produce hemorrhage or scarring that looks like a pigmented lesion.
• Posterior scleritis – Inflammation of the sclera behind the eye can cause pain and a raised lesion that resembles melanoma.

Recognizing the distinction between these entities and true uveal melanoma is a key step for ophthalmologists.

Associated Symptoms

When uveal melanoma grows large enough to affect ocular structures, patients may experience a constellation of visual changes. Commonly reported associated symptoms include:

• Floaters – Small, dark specks that drift across the visual field, caused by tumor cells or associated vitreous debris.
• Flashes of light (photopsia) – Sudden bursts of light, often triggered by retinal traction.
• Blurred or distorted vision – Particularly when the tumor is near the macula (central retina).
• Loss of peripheral vision – When the lesion compresses the optic nerve or peripheral retina.
• Red or dark spot visible on the iris or in the pupil – More common with iris melanomas.
• Eye pain or pressure – Unusual for early uveal melanoma but may appear with secondary inflammation or raised intra‑ocular pressure.
• Change in eye shape or protrusion (proptosis) – Rare, happens if the tumor extends into surrounding orbital tissues.
• Double vision (diplopia) – Usually a result of extra‑ocular muscle involvement from an advanced tumor.

These symptoms are often subtle and develop gradually, underscoring the importance of routine eye examinations, especially for individuals with risk factors such as fair skin, light eye color, or a family history of melanoma.

When to See a Doctor

Because early uveal melanoma may not cause pain, patients often delay seeking care. Below are clear criteria that should prompt an immediate ophthalmology appointment:

• New or increasing number of floaters, especially if they appear suddenly.
• Flashes of light that persist or repeat over several days.
• Any dark spot or discoloration that is visible through the pupil.
• Noticeable change in visual acuity (blurred vision that does not improve with rest).
• Loss of peripheral or central vision.
• Redness, pain, or pressure in the eye that does not resolve with over‑the‑counter drops.
• History of a known choroidal nevus that changes in size, color, or shape.

If any of these signs appear, schedule an eye exam within 1–2 weeks. Prompt evaluation can catch the tumor while it is still treatable with eye‑preserving therapies.

Diagnosis

Diagnosing uveal melanoma involves a combination of clinical examination, imaging, and sometimes tissue sampling. The typical work‑up includes:

1. Comprehensive Dilated Fundus Examination

Using an ophthalmoscope or slit‑lamp biomicroscope, the ophthalmologist examines the back of the eye after dilating the pupil. Pigmented, raised lesions with associated sub‑retinal fluid raise suspicion.

2. Fundus Photography

High‑resolution photographs document lesion size, color, and borders for future comparison.

3. Ultrasonography (B‑scan)

Provides information on tumor thickness, internal reflectivity, and shape. Melanomas typically appear as low‑to‑medium internal reflectivity with acoustic hollowness.

4. Optical Coherence Tomography (OCT)

Cross‑sectional images of the retina and choroid highlight sub‑retinal fluid, retinal detachment, and tumor infiltration.

5. Fluorescein and Indocyanine Green Angiography

Assess vascular patterns; melanomas often show a “double circulation” pattern.

6. Magnetic Resonance Imaging (MRI) of the Orbit

Used when extra‑ocular extension is suspected; melanomas have characteristic high signal on T1‑weighted images.

7. Fine‑Needle Aspiration Biopsy (FNAB)

Reserved for ambiguous cases; a tiny sample is taken through the sclera under local anesthesia and examined histologically.

8. Systemic Staging

Because up to 50 % of patients develop metastases (most commonly to the liver), baseline imaging—usually a liver MRI or CT scan and a chest/abdomen CT—may be ordered after confirmation of the ocular tumor.

Reference: American Academy of Ophthalmology (AAO) Preferred Practice Pattern for Uveal Melanoma, 2023.

Treatment Options

Treatment aims to eradicate the tumor while preserving the eye and vision whenever possible. Choice of therapy depends on tumor size, location, patient age, systemic health, and personal preferences.

Eye‑Saving Local Therapies

• Plaque Brachytherapy – A radioactive Au‑103, I‑125, or Pd‑103 plaque is surgically sutured to the sclera over the tumor for 3–7 days. Provides high‑dose radiation to the tumor while sparing surrounding tissue.
• Proton Beam Radiotherapy – External beam of protons precisely targets the tumor; especially useful for large or posterior lesions.
• Gamma Knife Radiosurgery – A form of stereotactic radiotherapy that can treat small to medium tumors.
• Transpupillary Thermotherapy (TTT) – Infrared laser heating of the tumor; often combined with radiation for small lesions.
• Photodynamic Therapy (PDT) – Light‑activated drugs that selectively damage tumor vasculature; less commonly used.

Surgical Interventions

• Local Excision (Partial Sclerouvectomy) – Removing the tumor with a margin of healthy tissue; reserved for small, accessible lesions.
• Enucleation – Surgical removal of the entire eyeball; indicated for very large tumors, painful blind eyes, or when there is extensive extra‑ocular spread. An orbital implant is placed to maintain cosmetic appearance.

Systemic Therapies for Metastatic Disease

• Immunotherapy – Checkpoint inhibitors (nivolumab, pembrolizumab) have shown activity in metastatic uveal melanoma.
• Targeted Therapy – Agents against the MAPK pathway (e.g., selumetinib) are under investigation.
• Liver‑Directed Treatments – Chemoembolization, radioembolization, or surgical resection of liver metastases, given the liver is the most common site.

Home and Supportive Care

• Regular follow‑up eye exams (every 3–6 months initially) to monitor for recurrence.
• Protect eyes from UV‑B radiation with sunglasses (UV‑blocking lenses) and wide‑brim hats.
• Maintain a healthy diet rich in antioxidants (leafy greens, berries) which may support overall ocular health.
• Psychological support or counseling, as a cancer diagnosis can be emotionally taxing.

Prevention Tips

While the exact cause of uveal melanoma remains unclear, several modifiable risk factors have been identified. Strategies to lower risk include:

• UV Protection – Wear 100 % UV‑blocking sunglasses and hats to reduce ocular exposure to UV radiation.
• Regular Dilated Eye Exams – Especially for individuals with light-colored eyes, a family history of melanoma, or known choroidal nevi.
• Avoid Smoking – Tobacco use has been linked to increased melanoma risk systemically.
• Control Sun Exposure – Seek shade between 10 am–4 pm; use broad‑brimmed hats.
• Maintain Healthy Body Weight – Obesity is a known risk factor for many cancers, including melanoma.
• Genetic Counseling – For families with multiple cases of ocular or cutaneous melanoma, testing for CDKN2A or BAP1 mutations may guide surveillance.

Emergency Warning Signs

If you experience any of the following, seek emergency medical care (ER or urgent ophthalmology) immediately:

• Sudden, severe eye pain or pressure that does not improve with rest.
• Rapid loss of vision in one eye (partial or total).
• Sudden onset of double vision accompanied by eye bulging.
• Acute bleeding inside the eye (visible as a dark red spot in the pupil) or a sudden clouding of vision.
• Signs of systemic metastasis such as unexplained abdominal pain, jaundice, or significant weight loss.

These conditions may indicate tumor rupture, secondary retinal detachment, or metastatic spread, all of which require prompt intervention.

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© 2026 HealthInfo Hub – All content reviewed by board‑certified ophthalmologists. References: Mayo Clinic, CDC, NIH National Cancer Institute, WHO, Cleveland Clinic, American Academy of Ophthalmology.

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