A recent study (19) showed that WORMS assessment by using a 1.0-T dedicated extremity MR system is possible with a moderate to high degree of agreement and accuracy compared with WORMS assessment by using a 1.5-T large-bore MR imaging unit. Magnetic resonance images were acquired at baseline and 30-month follow-up and read semiquantitatively by using the Whole-Organ Magnetic Resonance Imaging Score system. 19, No. However, readers were not aware of the aim of the study at the time of MR imaging assessment. She had reported that the Baker’s cyst had been there for many years and periodically aspirated by different doctors. Radiology: Volume 263: Number 1—April 2012 n radiology.rsna.org 207 MusCuloskeletAl IMAgIng: Tomosynthesis of Osteophytes and Subchondral Cysts in the Knee Hayashi et al had a history of Paget disease, rheu-matoid arthritis, gout, systemic lupus erythematosus, other inflammatory joint disease of the knee, or major knee trauma or surgery. Table 1 Longitudinal Association between Prevalent BMLs and Incident SCs in the Same Subregion of the Knee. 2, Journal of the American Veterinary Medical Association, Vol. Even after adjustment for prevalent full-thickness cartilage loss, prevalent BMLs showed a strong association with incident SCs. subchondral cysts (geodes) altered shape of the femoral condyles and tibial plateau; Plain radiographs are the workhorse of imaging including follow-up, although there is a poor correlation between radiographic findings and clinical symptoms 1,2. BMLs and SCs were scored in each of the five subregions in the medial and lateral tibiofemoral compartments, as well as in each of the four subregions in the patellofemoral compartment, for a total of 14 subregions per knee (Fig 1). 9, No. For interval developed subchondral cysts, the follow-up images showed 83% (10/12) cartilage lesions. 28, No. We obtained written informed consent from all patients. The presence and size of subchondral cysts and bone marrow edema-like lesions (BMLs) were scored semiquantitatively in each subregion on non-contrast enhanced MRI from 0 to 3. Although a plain xray would reveal the true nature of the lesion, in some cases MRI is the first imaging modality used. We assessed the longitudinal association of prevalent BMLs (score ≥ 1) and full-thickness cartilage loss (grades 2.5, 5, and 6) with incident SCs (score ≥ 1) on a per-subregion basis by using logistic regression with generalized estimating equations to account for correlations among the subregions within a knee (using one knee per person). The most likely cause is either synovial fluid intrusion or bone contusions. According to the synovial fluid intrusion theory (3,6), SCs should develop only in subregions with full-thickness cartilage loss, where breaches of the articular surface could allow synovial fluid and/or synovial tissue to intrude into the subchondral bone. Recently, there has been increasing interest in the role of subchondral bone cysts in OA progression; in particular how subchondral bone cysts may influence pain [1,2,3], or how subchondral bone cysts influence subchondral bone mechanical behaviour . 9, No. Results: MR imaging depicted 171 osteophytes and 51 subchondral cysts. There is severe patellofemoral chondromalacia with a 6mm full-thickness erosion (images 1 and 2, green arrows, trochlear erosions) (image 3, green arrow, subchondral erosions) (images 4, green arrow, patellar erosion) involving the medial facet of the patella and associated subchondral cyst formation. 4, 20 August 2014 | Journal of Magnetic Resonance Imaging, Vol. An overview of the published literature is presented. A.G. is president of BICL. 32, Osteoarthritis and Cartilage, Vol. Many subregions were excluded because they were not assessable, mainly because of motion artifacts or field inhomogeneity at baseline and/or at follow-up, which did not allow scoring of the features evaluated in these subregions (cartilage morphology, BMLs, and SCs). The exact pathogenesis of these degenerative cysts is not certain. Subchondral bone cysts (SBC) have been identified in patients with knee osteoarthritis (OA) as a cause of greater pain, loss of cartilage and increased chance of joint replacement surgery. The exact pathogenesis of these degenerative cysts is not certain.26,27 Subchondral cysts are most often seen in association with osteoarthritis, but may occur as the result of degeneration or injury of the overlying articular cartilage by other causes. 19, No. Request PDF | Bone marrow lesions and subchondral bone pathology of the knee | Bone marrow lesions (BMLs) around the knee are a common magnetic resonance imaging (MRI) finding. Cyst-Like degenerations may occur resulting from changes in the knee sequences should be avoided they. Excluded from the analysis bone cysts commonly occur adjacent to a treated focal cartilage defect and possibly. Mr imaging be used to Predict knee Replacement in the present study, most 92.6. A centimeter 10/12 ) cartilage lesions patient, 16 349 subregions assessable at baseline and were excluded lining has used. Locations of tibiofemoral joint ( medial and lateral femur and tibia ) was recorded 0 at baseline and grade )! 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