1　临床资料患者 ,男 ,5 3a,因双眼老年性白内障就诊。有高血压病史5 a,喜食各种肉类 ,曾到过东北、内蒙。于 1999年 3月 17日入院行双眼白内障囊外摘出加人工晶状体植入术 ,术中以上穹窿为基底作球结膜瓣 ,发现巩膜表面有囊样肿块 ,左眼 1个 ,于 12点角巩膜缘后 5 mm ,上直肌 1 clinical data patients, male, 5 3a, due to binocular senile cataract. Have a history of hypertension 5 a, eat a variety of meat, had been to the northeast, Inner Mongolia. March 17, 1999 hospital admission cataracts extracapsular cataract extraction and intraocular lens implantation, intraoperative more than the dome as the base for the conjunctival flap found scleral surface cystic mass, the left one, at 12 o’clock sclera Margins 5 mm, upper rectus muscle