MRI manifestations of malignant triton tumor:A report of 4 cases and literature review
10.13929/j.issn.1672-8475.2025.03.009
- VernacularTitle:恶性蝾螈瘤MRI表现:4例报告及文献复习
- Author:
Feng PAN
1
;
Anqi LI
1
;
Fei YUAN
1
Author Information
1. 北京大学人民医院放射科,北京 100044
- Publication Type:Journal Article
- Keywords:
soft tissue neoplasms;
sarcoma;
malignant triton tumor;
magnetic resonance imaging
- From:
Chinese Journal of Interventional Imaging and Therapy
2025;22(3):192-195
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe MRI manifestations of malignant triton tumor(MTT)combined with literature review.Methods Four patients with MTT confirmed by operation and pathology were retrospectively collected,and MRI findings were observed and analyzed combined with literature review.Results Single MTT was found in all 4 cases,located in the right thigh,right side of sacral region,neck and right shoulder,respectively,with the maximum diameter of 8.05-19.91 cm,and the average of 11.62 cm.The tumors shaped irregularly with unclear boundaries,presented as isointensity on T1WI and hyperintensity on T2WI.Intratumoral necrosis smaller than 50%of tumor volume was observed in all 4 cases,showing hypointensity on T1WI and hyperintensity on T2WI.Nodular-like structures were noticed both inside and at the edges of tumors,and"satellite"changes could be observed in some marginal nodules.All 4 lesions showed intratumoral separation presented as isointensity or hyperintensity on T1WI and hypointensity on T2WI were detected in all 4 cases,and intratumoral fascicular structures were found in 3 cases.On enhanced MRI,moderate enhancement and obvious enhancement were noticed each in 2 cases,while no enhancement was observed in the necrotic areas.All 4 MTT lesions grew in diffuse infiltration to the around tissue.Extensive peritumoral edema was found in 3 cases,while local peritumoral edema was observed in 1 case,and bone invasion was detected in 2 cases.No lymph node metastasis was observed in 4 cases.Conclusion MRI manifestations of MTT had certain characteristics.
