Chiste - genunchi ppt

MENISCAL CYST/BACHER CYSTS/ MENISCAL GANGLIA/ BURSAE

IN GENERAL:-hipointense T1- Hyperintense T2

Stalked meniscal cyst

- often contact with medial collateral ligament

-often stalked connection with damaged meniscus

MENISCAL CYSTS:

Ruptura cu traiect orizontal si oblic descendent in cornul posterior al meniscului intern, in continuitate cu un chist meniscal multiloculat; acesta diseca fibrele LCI, situindu-se intre straturile acestuia

Chist meniscal

Bursa Bursa semimembranoasa- semimembranoasa-

tendonul tendonul semimembranos si capul semimembranos si capul

medial al m. medial al m. gastrocnemian =Chist gastrocnemian =Chist Baker= chist popliteuBaker= chist popliteu

BACKER CYSTS:

- Always in communication with the joint cavity- Extensive involvement of soft tissues of lower

leg (ussually intermuscular)- Rupture possible

- DD: bursitis, malignancies (synovial sarcoma), vascular malformation, hemorrhage

MENISCAL GANGLIA- GANGLIONAR CYST

- Tend to be eccentric, pericapsular, not in the joint line

- Arising from the tendon sheath, muscles, ligaments, bursae with connection to originating structure

- May be intraosseous, often with septa, gelatinous filling

- Compression of neighboring structures

- No contrast enhacement, just possibily in the delicate peripheral rim and stalk

Chist ganglionar

Chiste anterior si Chiste anterior si posterior de tendonul posterior de tendonul m semimembranosm semimembranos

BURSAE: pes anserine, iliotibialis, deep infrapatellar, subcutaneous infrapatellar, , medial/ lateral gastrocnemian, semimembranosus, medial and lateral collateral ligaments

- Peripheral contrast enhancement in chronic bursitis (capsule thickening) and increased intensity of the central signal on T1 as well as decrease onT2 (increased protein)