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

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

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

 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

Large popliteal cyst, MRI

Supra popliteal cyst, T1 T2

Pop.cyst

Neck of popliteal cyst in axial view

popliteal cyst, T1 T2

popliteal and supra- popliteal cysts

Meniscal cyst

Meniscal cyst T2

Meniscal cyst T1

Loose body in politeal cyst

Loose body in joint space and popliteal cysts

Loose body by Xray

Meniscal cyst

Supra-popliteal and popliteal cysts

Supra-popliteal cyst