Fig. 3
From: Imaging diagnosis and differential diagnosis of extraskeletal osteosarcoma
A 59-year-old woman with EOS in the uterus. A, B Coronal CT showing a large uterine mass with large, massive calcification or ossification (black arrow) and extensive cystic degeneration and necrosis (yellow arrow). Metastatic lesions with multiple calcifications in the abdominal cavity were also observed (red arrows). C, D Calcification or ossification was hypointense on MR imaging (green arrow). F Mixed signals on T2WI, haemorrhage within the mass, and a fluid‒fluid level (purple arrow) were observed. B, F The enhanced CT and MR findings were consistent, showing less uniform and significant enhancement