CT and MRI findings of temporal bone rhabdomyosarcoma in children
QIU Jian
LI Xiaoyan
DING Yu
YAO Lihua
QIN Yongyuan
HUANG Bingle
ZENG Fanyong
LI Wenhua
Abstract：Objective To investigate CT and MRI imaging features of rhabdomyosarcomas(RMS)of the temporal bone.Methods CT,MR and immunohistochemical(IHC)data of 7 patients with RMS confirmed by surgical pathology were col-lected.The tumor location,size,boundary,shape,signal characteristics,apparent diffusion coefficient(ADC)value,enhance-ment characteristics and IHCindicators and Ki67 expression were retrospectively analyzed.Results Of those 7 patients,3 cases originated from petrous apex of temporal bone,2 cases from petrous body,and 2 cases from mastoid region of middle ear.The tumor size ranged from 1.9 cm×2.1 cm×2.9 cm-8.1 cm×4.7 cm×3.9 cm,with well-defined and irregular margins,low signal on T1WI,high signal on T2WI and homogeneous enhancement in 5 cases and heterogeneous enhancement in 2 cases.The ADC value of tumor ranged from 0.89 to 1.04(mean 0.92±0.07)×10-3mm2/s.Ki67 proliferative index was high in all tumors ranging from 50%to 80%.Conclusion RMS of temporal bone is osteolytic soft tissue mass,with clear margins,hypointensity on T1WI and hyperintensity on T2WIand DW imaging with strikingly enhancement and Ki67 highly expression.
Keywords：Temporal boneRhabdomyosarcomaTomographyX-ray computedMagnetic resonance imagingChildren
Publication Date：2024-03-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 20-23 )