Presentation
C/o knee pain. Nodule antero-lateral aspect of left knee.
Patient Data
Referred with MR of knee showing Low T1 SI High T2 SI lesion abutting iliotibial band. Presumed ganglion cyst.
A well-defined but irregular shaped lesion is noted abutting distal end of ilio-tibial band. It looks anechoic in first two images, hypoechoic in last two images. Single flow signal in peripheral part of the lesion is noted.
Hypoechoic lesion with definite vascularity.
Case Discussion
Findings of an extra-articular lesion abutting ilio-tibial band.
1st USG ( done by me ) reported a gaglion cyst - may be complex one with flow in periphery and hypoechoic in few planes.
2nd USG ( done by me ) - looked definitely solid lesion with vascularity. 1st USG images were reviewed and i felt it was an obvious solid lesion at that time also. So it was a misdiagnosis during 1st scan.
Surgical excision done.
Histopathology - Synovial sarcoma.