Fig. 1

MRI images. a Sagittal T2-weighted image shows that the uterus was replaced by diffuse inhomogeneous signal intensity. b Axial T2-weighted image shows that the lesion is ill defined and diffusely invades the myometrium. c, d Sagittal T1-weighted image shows the lesion appeared with hypointensity and inhomogeneous enhancement. e Colour perfusion map shows the slightly lower vascularity of the tumour (green area), while the greater vascularity is depicted in red (the normal myometrium). f The dynamic enhanced curve of the USC: avid enhancement, with both early and persistent enhancement