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Tamoxifen retinopathy. A clinicopathologic report
Ophthalmology
|January 1, 1981
Summary
Tamoxifen retinopathy, a side effect of breast cancer treatment, causes white retinal lesions. These lesions, found in the nerve fiber and inner plexiform layers, result from axonal degeneration due to tamoxifen chemotherapy.
Area of Science:
- Ophthalmology
- Oncology
- Pathology
Background:
- Tamoxifen is a widely used endocrine therapy for breast cancer.
- High-dosage tamoxifen treatment can lead to ocular side effects, including tamoxifen retinopathy.
Observation:
- A patient undergoing tamoxifen chemotherapy for metastatic breast carcinoma developed characteristic retinal lesions.
- Clinical examination revealed white, superficial, refractile lesions predominantly in the paramacular region.
- Postmortem examination confirmed lesions in the macular and paramacular areas, localized to the nerve fiber and inner plexiform layers.
Findings:
- Microscopic analysis identified lesions ranging from 3-10 microns (macular) to 30-35 microns (paramacular).
- Lesions stained positive for glycosaminoglycans.
- Electron microscopy showed smaller lesions were intracellular and larger ones extracellular, composed of branching filaments and coated vesicles within axons, suggesting axonal degeneration.
Implications:
- This study provides detailed ultrastructural insights into the pathological mechanisms of tamoxifen retinopathy.
- Understanding these mechanisms can aid in monitoring and managing ocular toxicity in patients receiving tamoxifen therapy.
- Further research may explore strategies to mitigate or prevent tamoxifen-induced retinal damage.