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眼肿瘤包括眼睑、结膜、眼球各层组织以及眼附件的肿瘤。良性或是恶性肿瘤均可损害眼部组织及其功能，恶性肿瘤可损害眼球及视功能，并可向眶周、颅内扩散或全身转移。全身某些部位器官组织的恶性肿瘤也可转移至眼部，但若是通过视神经孔或眶上裂向颅内扩展生长，也可威胁患者生命，造成严重后果。
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