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Related Experiment Videos

Bilateral choroidal melanomas. Case report and incidence

H F Shammas, R C Watzke

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |April 1, 1977
    PubMed
    Summary

    Bilateral choroidal melanoma is extremely rare, with an estimated incidence of 1 in 50 million white individuals. This rare cancer diagnosis occurs in approximately 1 in 2,500 whites.

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    Current eye research·1993

    Area of Science:

    • Ophthalmology
    • Oncology
    • Epidemiology

    Background:

    • Bilateral choroidal melanoma is a rare ocular malignancy.
    • The incidence and risk factors for developing bilateral choroidal melanoma are not well-established.
    • A case of bilateral choroidal melanoma in a 55-year-old woman prompted this epidemiological investigation.

    Purpose of the Study:

    • To determine the incidence of unilateral choroidal and ciliary body melanomas in the white population of Iowa.
    • To calculate the risk of developing a second primary melanoma in the contralateral eye.
    • To estimate the overall incidence of bilateral choroidal melanoma in the United States.

    Main Methods:

    • Retrospective analysis of epidemiological data for choroidal and ciliary body melanomas.
    • Calculation of incidence rates based on age, sex, and race (white population).
    • Statistical modeling to estimate the risk of secondary primary melanoma and bilateral disease occurrence.

    Main Results:

    • The lifetime incidence of unilateral choroidal melanoma in the white population is approximately 1 in 2,500.
    • In a white population of 50 million, only 1 person is expected to develop bilateral choroidal melanoma in their lifetime.
    • Bilateral choroidal melanoma is estimated to occur once every 18 years in the United States.

    Conclusions:

    • Bilateral choroidal melanoma is an exceptionally rare condition.
    • The study provides a quantitative estimate of the incidence and risk of bilateral choroidal melanoma.
    • Further research may be warranted to understand the specific risk factors and genetic predispositions for this rare presentation.

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