Case Overview
- A 27-year-old healthy male experienced 11 recurrences of acute posterior multifocal placoid pigment epitheliopathy (APMPPE) over 15 years, with 5 episodes documented by imaging.
- Longest documented course and greatest number of recurrences reported for APMPPE.
- Initial onset at age 24 post-tonsillectomy/adenoidectomy; final visual acuity at last follow-up: 20/20 OD, 20/25 OS.
Clinical Presentation
- Recurrent new scotomata as the primary symptom, affecting both eyes across episodes.
- Initial episode: scotoma in left eye post-surgery; subsequent episodes alternated between eyes.
- No systemic symptoms (e.g., headache, back pain) or significant medical history beyond surgery.
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Imaging Findings
- Fundus Photography: Pigment mottling, scarring in macula, geographic lesions centrally, smaller lesions in posterior pole; new active white placoid lesions with each recurrence.
- Fluorescein Angiography (FA):
- Early hypofluorescence of acute lesions (blockage).
- Late staining of older inactive lesions (window defects).
- Fundus Autofluorescence (FAF): Hyperautofluorescence of active lesions, mottled hypoautofluorescence of old lesions.
- Optical Coherence Tomography (OCT):
- Acute lesions: swelling/hyperreflectivity in outer retinal layers, disruption of outer segments, attenuation of external limiting membrane, ellipsoid, and interdigitation zones, enhanced choroidal transmission.
- Old lesions: irregularity/thinning of outer nuclear layer, interdigitation zone disruption, hyperreflectivity of Henle layer.
- Indocyanine Green Angiography (ICGA) mentioned but not detailed in this case.
Disease Course
- Typically monophasic, APMPPE rarely recurs; this case is an outlier with 11 episodes over 15 years.
- Each episode: new subjective scotomata, new lesions on imaging, mostly spontaneous resolution of symptoms.
- One episode treated with systemic corticosteroids (2 months) due to foveal involvement; other 10 episodes recovered spontaneously.
- No significant chorioretinal atrophy or choroidal neovascularization (CNV) developed, unlike other placoid diseases.
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Visual Outcome
- Excellent visual recovery despite recurrences: 20/20 OD, 20/25 OS at last follow-up.
- Symptoms mostly resolved after each episode, contrasting with poorer outcomes in some literature cases.
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Differential Diagnosis
- APMPPE vs. Serpiginous Choroiditis (SC):
- SC: recurrences contiguous with old lesions, pseudopodal pattern, severe chorioretinal atrophy, common CNV—none seen in this patient.
- APMPPE: discrete, simultaneous active lesions, dramatic recovery, minimal atrophy.
- APMPPE vs. Relentless Placoid Chorioretinitis (RPC):
- RPC: relentless lesion development (hundreds), poor recovery without immunosuppression, peripheral extension—this patient had posterior pole lesions only, excellent recovery without treatment.
- APMPPE vs. Persistent Placoid Maculopathy (PPM):
- PPM: prolonged lesions (months to >1 year), bilateral/symmetric, common CNV—this patient had rapid lesion resolution, unilateral/asymmetric recurrences, no CNV.
- Key distinguishing features: lesion distribution, recovery pattern, lack of severe sequelae.
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High-Yield Comparisons (Table 1)
- APMPPE: Young age, lesions heal in weeks with little atrophy, good visual outcome, posterior pole ± equator, rare recurrences, usually no treatment needed.
- SC: Young to middle-aged, lesions heal over weeks to months, poor outcome if fovea involved (atrophy), peripapillary/macula, contiguous recurrences, requires immunosuppression.
- RPC: Young to middle-aged, continuous lesion growth/confluence (hundreds), poor outcome if fovea involved (CNV/atrophy), posterior pole + periphery, noncontiguous recurrences, requires immunosuppression.
- PPM: Age 50-60, lesions persist months to >1 year, poor outcome (CNV/atrophy), posterior pole only (bilateral/symmetric), usually uniphasic, requires immunosuppression.
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Management Considerations
- Most APMPPE cases recover without treatment; this case supports observation for recurrent cases with good recovery.
- Systemic corticosteroids used once for foveal involvement; no long-term immunosuppression due to minimal persistent damage and excellent outcomes.
- Close follow-up and periodic imaging critical to monitor recurrences and prevent vision loss.
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Key Takeaways for Exams
- APMPPE can rarely be recurrent over a prolonged period (15 years, 11 episodes)—consider in patients with recurrent scotomata and new placoid lesions.
- Imaging hallmarks: FA early hypofluorescence → late staining; OCT outer retinal disruption/hyperreflectivity in acute phase.
- Excellent visual prognosis possible even with multiple recurrences, distinguishing it from SC, RPC, PPM.
- Differential relies on clinical course, lesion pattern, and sequelae (atrophy/CNV absent in this APMPPE case).
- Treatment not always required; weigh risks of immunosuppression vs. spontaneous recovery.