视网膜母细胞瘤的CT与MRI诊断

CT and MRI diagnosis of retinoblastoma

目的:探讨CT与MRI对视网膜母细胞瘤的诊断价值。方法:16例视网膜母细胞瘤,11例行CT检查,4例行MRI检查,1例同时行CT和MRI检查。回顾性分析其影像学征像。结果:视网膜母细胞瘤的CT征象主要表现为眼环后份或以后份为主的软组织肿块,伴有斑点及斑块状钙化,钙化显示率达92.9%(13/14)。MRI主要表现为眼环内软组织信号肿块,部分病例肿块内可见更低信号影,钙化显示率仅40%(2/5),但MRI对肿瘤侵犯周围结构较敏感。结论:CT与MRI对视网膜母细胞瘤的诊断价值,以CT较具优势,肿块内钙化可以认为是视网膜母细胞瘤定性诊断依据。影像学检查对于临床确定治疗方案和判断预后具有重要临床价值。

Objective:To investigate and compare the value of imaging diagnosis of retinoblastoma.Methods:16 cases of retinoblastoma were collected in the study.There were 11 cases with CT examination,4 cases with MRI examination,1 case with CT and MRI examination.The signs of imaging were retrospectively analyzed.Results:CT signs of retinoblastoma mainly demonstrated soft tissue mass with fleck or plaque calcification on posterior part of the eye ring.The rate of calcification of tumors was 92.9%(13/14).MRI signs mainly appeared soft tissue mass in the eye ring,some cases with lower signal calcifications in the mass,which the rate of calcification was only 40%(2/5).But MRI was better to display the adjacent lesion of eye ring.Conclusion:CT was superior to other imaging methods in diagnosis of retinoblastoma,calcification within the mass can be considered qualitative diagnosis of retinoblastoma.Imaging examination is important in choice of clinical therapy planning and judgment of prognosis.