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病源脉络膜肿瘤几乎发生在50～60岁间,然而多年来也见于年青人。郭秉宽在65例葡萄膜肿瘤中的40例脉络膜肿瘤仅2例发生在19～20岁。年龄最小的可为3岁和出生后9个月。Wider 和 Paul 在3,628例黑瘤中,10～20岁患者占0.6%。世界最先报导及讨论此种恶癌者为 Laennec(1819年),我国最早由林文秉(1931年)报告1例,以后陆续有所报导,但仍以郭秉宽报告的40例为我国文献中最多者。脉络膜恶性黑瘤约占门诊初诊病例的0.0039～0.0044%,占葡萄膜肿瘤的88%,男性多于女性。良性肿瘤可因炎症而转为恶性,尤其在萎缩的眼球是如此。
Choroidal neoplasms occur in almost 50 to 60 years of age, but are also found in young people over the years. Guo Bingkuan in 65 cases of uveal tumors in 40 cases of choroidal tumors in only 2 cases occurred in 19 to 20 years old. The youngest can be 3 years old and 9 months after birth. Among 3,628 melanomas, Wider and Paul accounted for 0.6% of patients 10 to 20 years of age. The world’s first report and discussion of such malignant cancer is Laennec (1819), the earliest reported by Lin Wen-Bing (1931) in China and one case reported later in succession. However, 40 cases still reported by Guo Bingkuan were the most . Choroidal malignant melanoma accounted for about 0.0039 ~ 0.0044% of newly diagnosed outpatient cases, accounting for 88% of uveal tumors, more men than women. Benign tumors can turn malignant due to inflammation, especially in the atrophic eyeballs.