This is the fundus photo of patient. What is the diagnosis
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white elevated optic disc lesion retinal tumor diagnosis fundus examination
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Diagnosis: Retinal Astrocytic Hamartoma
The fundus image — captured through an indirect ophthalmoscopy lens — shows a large, white-yellow, elevated, lobulated ("mulberry-like") lesion centered over/near the optic disc, with surrounding hard lipid exudates. This is the classic appearance of a retinal astrocytic hamartoma.
Key Findings in This Image
| Finding | Significance |
|---|---|
| White-yellow, elevated, lobulated mass at/near optic disc | Classic astrocytic hamartoma appearance |
| "Mulberry-like" or "cottage cheese" texture | Calcification within the hamartoma |
| Hard exudates (yellow deposits) adjacent to lesion | Secondary exudation from the tumor |
| Overlying/obscuring retinal vessels | Superficial inner retinal layer origin |
What is a Retinal Astrocytic Hamartoma?
A benign, glial (astrocytic) tumor arising from the nerve fiber layer of the retina or optic disc. It can be:
- Flat and translucent (early/young lesion)
- Elevated, white-yellow, calcified with mulberry appearance (mature/classic lesion — as seen here)
Critical Association: Tuberous Sclerosis Complex (TSC)
Retinal astrocytic hamartomas are pathognomonic of Tuberous Sclerosis Complex (TSC) when bilateral or multiple, and are found in ~50% of TSC patients. However, they can also occur:
- Sporadically (isolated, unilateral)
- In neurofibromatosis type 1 (rare)
TSC workup is mandatory if this is a new finding, especially in younger patients. Screen for:
- Brain MRI (cortical tubers, subependymal nodules)
- Skin (ash-leaf spots, shagreen patches, facial angiofibromas)
- Renal angiomyolipomas
- Cardiac rhabdomyomas (especially in children)
Differential Diagnoses to Exclude
| Condition | Distinguishing Features |
|---|---|
| Retinoblastoma | Typically in children <5 years; leukocoria; more aggressive growth |
| Optic disc drusen | Buried, smaller, bilateral; no lobulated mass |
| Retinal hemangioblastoma (VHL) | Red/orange vascular tumor; dilated feeder vessels; associated with VHL disease |
| Choroidal osteoma | Yellow-white, peripapillary; geographic; calcified on US |
| Myelinated nerve fibers | Feathery white streaks along nerve fiber bundles; flat |
Management
- No treatment needed for stable, asymptomatic lesions
- Annual fundus monitoring for growth or exudation
- OCT of the lesion (shows hyporeflective cystic spaces and posterior shadowing from calcification)
- Systemic evaluation for TSC if not previously done
- Refer to a vitreoretinal specialist or ocular oncologist for confirmation
Important: While the image is strongly suggestive of astrocytic hamartoma, formal diagnosis requires slit-lamp biomicroscopy, OCT, B-scan ultrasonography, and correlation with the patient's systemic history.
Searching for relevant information on the fundus findings visible in this image — a large white-yellow elevated lesion at the macular area
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white yellow elevated macular lesion fundus exudates macular disease
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large white yellow elevated lesion macula fundus diagnosis differential
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Thank you for the clarification. Re-examining the image with the lesion centered in the macular region (not the optic disc), the diagnosis shifts significantly.
Revised Diagnosis: Advanced Neovascular (Wet) Age-Related Macular Degeneration (nAMD)
The fundus image shows a large, elevated, white-yellow heterogeneous lesion centered at the macula with surrounding hard lipid exudates and evidence of subretinal exudative material — the classic presentation of advanced wet AMD with subretinal fibrosis.
Key Findings & Their Interpretation
| Finding | Significance |
|---|---|
| Large, elevated white-yellow macular mass | Subretinal fibrosis / disciform scar from chronic CNV |
| Hard lipid exudates (yellow deposits) around lesion | Chronic exudation from choroidal neovascularization (CNV) |
| Heterogeneous lesion (pale + pigmented areas) | Mixed fibrosis, exudate, and pigmentary changes |
| Displaced/obscured macular vessels | Severe architectural distortion |
| Older adult patient (as visible in image) | Consistent with AMD demographics |
Pathophysiology
In wet AMD:
- Abnormal choroidal new vessels (CNV) breach Bruch's membrane
- These vessels leak fluid, blood, and lipid → subretinal/intraretinal exudation
- Chronic, untreated CNV leads to subretinal fibrosis (disciform scar)
- The end result — a large white-yellow elevated macular scar — is exactly what is seen here
This stage is often called a "disciform scar" — representing end-stage wet AMD.
Differential Diagnoses
| Condition | Distinguishing Features |
|---|---|
| Wet AMD with disciform scar ✅ | Age >50, macular location, exudates, fibrosis, gradual central vision loss |
| Central Serous Chorioretinopathy (CSCR) | Younger patients, serous detachment, no thick fibrosis |
| Polypoidal Choroidal Vasculopathy (PCV) | Orange polyps near disc, more common in Asian/African patients; can mimic AMD |
| Choroidal neovascularization (other causes) | Myopia, angioid streaks, POHS — requires history |
| Astrocytic hamartoma | Located at optic disc, mulberry calcified appearance |
| Choroidal melanoma | Elevated pigmented lesion, orange lipofuscin, B-scan dome shape |
Staging: This Appears to Be Late/End-Stage Wet AMD
- Early AMD: Drusen only
- Intermediate AMD: Large drusen, pigmentary changes
- Late AMD (wet): CNV, subretinal fluid/hemorrhage, exudates
- End-stage (disciform): Large fibrovascular scar — as seen here
Investigations to Confirm
| Investigation | Expected Finding |
|---|---|
| OCT macula | Subretinal/intraretinal fluid, fibrovascular PED, hyperreflective subretinal material |
| FFA (Fluorescein Angiography) | Late leakage, fibrotic scar with blocked fluorescence |
| ICGA (Indocyanine Green) | Polyps if PCV; CNV characterization |
| B-scan ultrasound | Rules out choroidal mass |
Management
Since this appears to be a disciform (end-stage) scar, the prognosis for central vision in this eye is poor. However:
- Confirm activity with OCT — if fluid is still present, anti-VEGF therapy (Ranibizumab, Bevacizumab, Aflibercept, Faricimab) may halt further progression
- Protect the fellow eye: Check for early AMD signs; counsel on Amsler grid monitoring and AREDS2 supplementation (Vitamins C, E, Zinc, Lutein, Zeaxanthin)
- Low vision rehabilitation for the affected eye
- Urgent referral to a vitreoretinal specialist
The patient should be advised that while central vision in this eye may be severely compromised, treatment of the fellow eye (if affected) can preserve functional vision.
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