1. Popliteal and suprapopliteal cyst Jalal Jalal Shokouhi-MD, ISR Firous Tabarrok-MD, Shahid beheshti M.U Mohammad hossein Herischi-MD,PhD, Baku, Azerbaijan Shahyar Pashaei-PhD, Boniad daneshname negari,Iran Aliakbar Ameri-MD, Jaam e jam

4. I.Abnormal cystic recess of synovial II.From medial post. Part III.Between gastrocnemius and semimembranosus bursas IV.Under femoral condyle level V.20-30% pupulation VI.Compressable by US VII.DDx with popliteal artery aneurysm VIII.Could contain loose body IX.DDx with D.V.T if rupture X.DDx with meniscal and intercondylar cysts

5. Suprapopliteal cysts: i.Up to femoral condyle level ii.No connection to regular popliteal cyst even in pneumoarthrography iii.Round, oval and multivesicular iv.No compressible in US study v.With no loose body vi.Cyst beside tendon of gastrocnemius tendon vii.Pneumoarthrogram is negative for

6.  Conclusion: 1.MRI and US could show both popliteal and suprapopliteal cysts 2.X-ray and X-ray CT pneumoarthrography couldn’t show supra-popliteal cyst 3.Loose body is not seen in suprapopliteal cyst 4.I found these result in 400 patients with 112 cysts

7. Large popliteal cyst, MRI

9. Supra popliteal cyst, T1 T2

10. Pop.cyst

11. Neck of popliteal cyst in axial view

12. popliteal cyst, T1 T2

13. popliteal and supra- popliteal cysts

14. Meniscal cyst

16. Meniscal cyst T2

17. Meniscal cyst T1

18. Loose body in politeal cyst

21. Loose body in joint space and popliteal cysts

22. Loose body by Xray

25. Meniscal cyst

26. Supra-popliteal and popliteal cysts

29. Supra-popliteal cyst