Head and Neck Imaging
The Value of Nuclear Magnetic Diagnosis of Choroidal Melanoma
Author：YAN Yu-qing, ZHAO Hong
affiliation：Tianjin Haihe Hospital, Tianjin 300300, China
PDFAbstract
Objective The relationship between mri signal characteristics of 32 cases (32 eyes) choroidal melanoma and the pathologic and intraorbital spread was analyzed. Methods A retrospective study was performed on 32 patients (32 eyes) of choroidal melanoma patients admitted to tianjin eye hospital from September 2003 to March 2010. Results In 32 cases of choroidal melanoma, 29 cases showed high signal and T2W low signal in T1W1. In 3 cases, T1W1 showed moderate signal and T2W1 showed low signal (2 cases of the ciliary body and the anterior choroid were all mixed with retinal subretinal and vitreous hemorrhage). 1 case of spindle cell type, with exudative retinal detachment, may be caused by the hemorrhage of the retina and vitreous body, and the hemorrhage of the tumor accompanied by a large number of tumor cell necrosis, and the signal characteristics are atypical.In one case, T1WI and T2WI were intermediate signals, possibly due to low melanin content. Conclusion Nuclear magnetism is characteristic of choroidal melanoma, but in small tumors or diffuse growth, the signal strength of low pigment is not typical, and other methods of examination are needed.
【Keyword】Choroid Melanin; Nuclear Magnetic Resonance; Pathology; Computed Tomography
【Chart number】R773.4
【Document Identification Number】A
【DOI】10.3969/j.issn.1672-5131.2018.08.009
Chinese journal of CT and MRI
th16Volume， th 8 Issue
2018Year08Month
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