alexa Eye melanoma | Mexico| PDF | PPT| Case Reports | Symptoms | Treatment

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  • Eye melanoma

    Introduction

    Iris nevi and melanomas are the most common primary tumors of the iris, with an incidence ranging from 50-70% of all iris tumors; of these, 10-24% may be melanomas. Melanomas arise from malignant proliferation of the neuroectodermally derived iris stromal melanocytes, which replaces the normal iris stromal architecture. While melanoma is the most common primary malignancy of the iris, it comprises only 3%-10% of all uveal melanomas.

    Symptoms

    Eye melanoma may not cause signs and symptoms. When they do occur, signs and symptoms of eye melanoma can include growing dark spot on the iris, sensation of flashing lights, change in the shape of the dark circle (pupil) at the center of your eye, poor or blurry vision in one eye etc.

    Pathophysiology

    Most iris melanomas are believed to arise from active growth in preexisting nevi. Epidemiologic studies suggest that sunlight exposure plays a role in their pathogenesis. Chromosomal mutations may be involved.

    Epidemiology

    Ocular melanoma is the most common primary cancer of the eye in adults. It is diagnosed in about 2,500 adults every year in the United States and occurs most often in lightly pigmented individuals with a median age of 55 years. However, it can occur in all races and at any age. 

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