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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: J Knee Surg. 2018 Nov 16;32(4):322–330. doi: 10.1055/s-0038-1675609

Fig. 9.

Fig. 9

A 58-year-old man presented with enlarging anterior knee mass following impact injury 1 to 2 years prior. Mass was previously stable for many years and initially mistaken for a cyst. (A) Axial T2-weighted image with fat suppression demonstrates a large juxta-articular mass (white arrows in A-C) with triple signal intensity, areas of high, and intermediate and low signal intensity. (B) On coronal T1-weighted image, the mass is sharply marginated with smooth round contours and heterogeneous signal. (C) The mass enhances heterogeneously post contrast on sagittal T1-weighted image with fat suppression excluding cyst from the differential diagnosis. The diagnosis of synovial sarcoma was confirmed on computed tomography guided biopsy.