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Imaging findings of undifferentiated pleomorphic sarcoma of long bone (20 cases report)
LI Yaning  JIANG Yonghong  ZHANG Yuting  LIU Zhenghua 

Cite this article as: Li YN, Jiang YH, Zhang YT, et al. Imaging findings of undifferentiated pleomorphic sarcoma of long bone (20 cases report)[J]. Chin J Magn Reson Imaging, 2021, 12(5): 81-84. DOI:10.12015/issn.1674-8034.2021.05.018.


[Abstract] Objective To investigate the imaging features of undifferentiated pleomorphic sarcoma of long bone (BUPS). Materials andMethods Collect clinical and imaging data of 20 cases (BUPS) confirmed by surgery and pathology in our hospital, imaging features were retrospectively analyzed.Results Fifteen cases occurred in the Epiphysis (5 cases occurred in the neck of femur, 10 cases occurred in the other epiphysis), 5 cases occurred in the diaphysis. Cystic bone destruction was observed in all 5 cases of femoral neck, and high density shadow was seen in 1 case. The 5 cases of diaphysis presented worm etched bone destruction, which grew along the longitudinal axis of the bone, and the longitudinal diameter was much larger than the transverse diameter (all the 5 cases had greater longitudinal diameter than the transverse diameter). Large massive bone destruction occurred at the distal femur and the proximal tibia, or the area of bone destruction was mainly mixed up with thick bone crest of different thickness, and Codman, were observed in 2 cases. Magnetic resonance T1WI is a hybrid signal dominated by isosignals. T2WI showed mixed signals mainly with high signals, high signals were mostly seen at the edge of lesions. High signal cystic changes were observed at the lesion margins in 7 of 11 cases on FS-T2WI. Nine cases have large soft masses, soft tissue masses is larger than the area of bone destruction.Conclusions The imaging features of BUPS in different parts are different. The femoral neck was mostly characterized by cystic bone destruction with clear boundaries. Most of the diaphysis presented as worm erosion bone destruction along the longitudinal axis of the bone. The metaphysis of distal femur and proximal tibia showed large lamellar bone destruction, interspersed with bone crest of different thickness. Magnetic resonance T1WI is dominated by isosignals. T2WI was mainly manifested by high signal, and high signal at the edge of lesion on FS-T2WI was suggestive.
[Keywords] undifferentiated pleomorphic sarcoma of bone；malignant fibrous histiocytoma of bone；imaging diagnosis；magnetic resonance imaging；computer tomography

LI Yaning   JIANG Yonghong*   ZHANG Yuting   LIU Zhenghua  

Department of Radiology, Honghui Hospital, Xi'an Jiaotong University, Xi'an 710054, China

Jiang YH, E-mail: 526017009@qq.com

Conflicts of interest   None.

Received  2021-01-04
Accepted  2021-03-25
DOI: 10.12015/issn.1674-8034.2021.05.018
Cite this article as: Li YN, Jiang YH, Zhang YT, et al. Imaging findings of undifferentiated pleomorphic sarcoma of long bone (20 cases report)[J]. Chin J Magn Reson Imaging, 2021, 12(5): 81-84. DOI:10.12015/issn.1674-8034.2021.05.018.

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