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Retained intraocular foreign body simulating choroidal melanoma. A report of two cases
1Department of Ophthalmology and Orthoptics, University of Sheffield Medical School, United Kingdom.
Abstract:
Many different lesions can be difficult to distinguish from malignant melanomas of the choroid. With the use of modern diagnostic facilities the misdiagnosis rate has been greatly reduced. In a recent report from the Collaborative Ocular Melanoma Study Group the incidence of misdiagnosis was only 0.48%. The presence of a retained intraocular foreign body presenting as a raised pigmented choroidal mass similar to a uveal melanoma is rare. We report two cases in which retained intraocular foreign bodies presented clinically as raised pigmented intraocular lesions. Retained intraocular foreign bodies should be considered in the differential diagnosis of ocular tumours, especially if there are any atypical features.
Insights
Distinguishing choroidal melanoma from other lesions is challenging. Retained intraocular foreign bodies can mimic these tumors, necessitating their inclusion in differential diagnoses for ocular tumors.
Area of Science:
- Ophthalmology
- Pathology
Background:
- Malignant melanomas of the choroid can be difficult to differentiate from other ocular lesions.
- Modern diagnostic tools have significantly reduced the misdiagnosis rate of choroidal melanomas.
Observation:
- A rare presentation involves retained intraocular foreign bodies mimicking uveal melanoma.
- Two cases are presented where foreign bodies appeared as raised, pigmented choroidal masses.
Findings:
- Retained intraocular foreign bodies can clinically present as raised pigmented intraocular lesions.
- The misdiagnosis rate for choroidal melanoma is low (0.48% in a recent study).
Implications:
- Intraocular foreign bodies should be considered in the differential diagnosis of ocular tumors.
- Atypical features in suspected ocular tumors warrant consideration of foreign body presence.