脉络膜骨瘤为视乳头旁脉络膜良性骨化肿瘤,多见于健康白人青年女性(平均年龄为19一20岁),属于获得性肿瘤。多为单眼,双眼者约占20%。病变常累及黄斑,早期就有视力模糊、视物变形或旁中心暗点等。黄斑区视网膜下有新生血管者视力明显下降。在所报告的病例中,视力降至0.1以下者不到10%,其中约1/4的患者最后视力仍保持这一水平,而一半患者最后视力可恢复到0.7以上。眼底镜下脉络膜骨瘤为黄白色凹凸不平的轻度隆起,肿瘤周边偏于桔红颜色。大多数肿瘤为圆形或卵圆形,境界清楚,边缘或为不规则地图状,或为扇形。肿瘤表面多发性短血管丛常作为与脉络膜血管瘤或转移瘤鉴别诊断特有的体征。偶尔肿瘤外缘视网膜色素上皮层有一色素部分脱 Choroidal osteoma is a benign optic choroidal ossification of the tumor, more common in healthy white young women (mean age 19 to 20 years), are acquired tumors. Mostly monocular, eyes, about 20%. Lesions often affect the macula, blurred vision early, visual distortion or next to the center dark spots. Macular retinal neovascularization significantly decreased visual acuity. In the reported cases, visual acuity decreased to less than 0.1 less than 10%, of which about 1/4 of patients with the final visual acuity remained at this level, and half of the patients with visual acuity can be restored to 0.7 or more. Ocular fundus choroidal osteoma was yellowish white uneven slightly elevated tumor periphery partial to orange color. Most tumors are round or oval, clear, border or irregularly shaped, or fan-shaped. Multiple vascular surface of the tumor surface often as a differential diagnosis with choroidal hemangiomas or metastases signs. Occasionally tumor rim retinal pigment epithelium has a pigment off