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Photocoagulation of malignant melanoma
Archives of Ophthalmology (Chicago, Ill. : 1960)
|January 1, 1979
Summary
Photocoagulation therapy for suspected choroidal melanoma was attempted in a patient. Post-treatment, pigment accumulation in macrophages mimicked tumor growth, leading to enucleation.
Area of Science:
- Ophthalmology
- Oncology
- Pathology
Background:
- Choroidal melanoma is a rare intraocular malignancy.
- Accurate diagnosis and monitoring are crucial for treatment planning.
- Photocoagulation is a potential treatment modality for certain choroidal lesions.
Observation:
- A 59-year-old woman presented with a pigmented, expanding posterior choroidal lesion suspicious for malignant melanoma.
- The patient initially refused enucleation and underwent two sessions of photocoagulation therapy.
- Following treatment, apparent lesion growth and pigmentation changes were noted, leading to globe enucleation.
Findings:
- Histopathologic examination revealed rare neoplastic cells but abundant pigment-laden macrophages and central necrosis.
- The clinical appearance of tumor growth was attributed to pigment accumulation within macrophages.
- This finding highlights a potential diagnostic pitfall in evaluating choroidal lesions.
Implications:
- Pigment-laden macrophages can mimic tumor progression in choroidal lesions, complicating clinical assessment.
- Careful histopathologic correlation is essential to differentiate true tumor growth from reactive cellular changes.
- This case underscores the importance of considering differential diagnoses in ophthalmology, even with apparent clinical consistency.