chiste - genunchi ppt
TRANSCRIPT
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)