患者男，19岁。右眼异物感2周，发现外眼角有一肿物，无红。痛，自点眼药水无效就诊。否认有外伤史，其它眼病及结核史。眼科检查：视力右1．0，左1．0。眼睑泪器均正常，右眼外跳部角膜缘外上方5～6mm处有一灰白色肿物，约黄豆大，与结膜无粘连，与下方巩膜粘连，不能移动，较 Male patient, 19 years old. Right eye foreign body sensation 2 weeks, found that there is a tumor outside the corner, no red. Pain, invalid eye drops invalid treatment. Denied the history of trauma, other eye diseases and tuberculosis. Eye examination: visual acuity 1.0, left 1.0. Eyelid tear lacrimal normal right outside the corneal margin above the corneal margin 5 ~ 6mm at an ash-white mass, about soybeans, no adhesions with the conjunctiva, and below the scleral adhesions, can not move, more