label: malignant choroid melanoma
label_lc: malignant choroid melanoma
description: A uveal melanoma that arises from the choroid. It is the most common primary malignant intraocular tumor. It usually affects Caucasians of northern European descent. It usually remains asymptomatic for a long period. When signs and symptoms occur, they include blurred vision, visual field loss, floaters, and ocular pain. Tumor size is the most important factor that relates to prognosis.