视网膜母细胞瘤的CT诊断

目的:探讨视网膜母细胞瘤的CT表现特征。方法:回顾分析 51 例经手术病理证实的视网膜母细胞瘤。术前均采用层厚、层距为 2~3 mm的 CT轴位扫描。10 例行增强扫描,对比剂用量为 1.5 ml/kg,注射流率为 1.5 ml/s。结果:CT发现51例中单眼发病48例,双眼发病3例;48例表现为眼球内肿块伴钙化,眼球增大26例,眼环受累12 例,视网膜脱离9例。视神经增粗16例,眶内侵犯2例,眶周侵犯 2 例,颅内侵犯 3 例。病理学检查 18 例视神经受累。结论:CT是诊断视网膜母细胞瘤的重要工具。对其可做出定位和定性诊断,并可进行准确分期。

CT Diagnosis of Retinoblastoma

Objective:To discuss CT characteristics of retinoblastoma.Methods:51 cases proved by surgery and pathology were analyzed retrospectly.Axial CT scans were performed in all cases before operation.Slice thickness and the gap were 2 or 3mm.Enhanced CT scan was performed in 10 cases.The dosage of contrast medium was 1.5ml/kg with 1.5ml/s of injection rate.Results:In 51 cases,single retinoblastoma was found in 48,bilateral retinoblastomas were found in 3 cases.The CT findings included soft tissue mass with calcification in 48 cases,enlargement of eyeball in 26 cases,invasion in wall of eye in 12 cases,retinal detachment in 9 cases,infiltration of optic nerve in 16 cases,intraorbital involvement in 2 cases,extra extraorbital involvement in 2 cases and intracranial incolvement in 3 cases.Pathologic study showed infiltration of optic nerve in 18 cases.Conclusion:CT is an important tool for diagnosis and staging of retionoblastoma.