10.1016/j.joca.2006.05.011 [Google Scholar] Chan P. M. B., Wen C., Yang W. C., Yan C., Chiu K. (2017). Some limitations to the current study need mentioning. Subchondral cyst. For interval developed subchondral cysts, the follow-up images showed 83% (10/12) cartilage lesions. Thus, grades 2.5, 5, and 6 include full-thickness cartilage loss, but the other grades do not. 3, Journal of Clinical Medicine, Vol. One thousand two hundred eighty-three knees (one knee per patient, 16 349 subregions assessable at baseline and follow-up examinations) were included. To assess the association of prevalent bone marrow edema–like lesions (BMLs) and full-thickness cartilage loss with incident subchondral cyst–like lesions (SCs) in the knee to evaluate the bone contusion versus synovial fluid intrusion theories of SC formation. Knees with typical MR imaging signs of traumatic bone contusions, osteonecrosis, fracture, or malignant bone infiltration were excluded from the analysis. Published by Elsevier Ltd. All rights reserved. The Baker’s cyst was easily palpated and grossly seen with the patient in the prone position. 36, No. Bone marrow lesions and subchondral bone pathology of the knee Kon, Elizaveta; Ronga, Mario; Filardo, Giuseppe; Farr, Jack; Madry, Henning; Milano, Giuseppe; Andriolo, Luca; Shabshin, Nogah 2016-06-01 00:00:00 Bone marrow lesions (BMLs) around the knee are a common magnetic resonance imaging (MRI) finding. Methods. The subchondral cyst was determined as the source of the excess synovial fluid filling up the Baker’s cyst. 1, 20 August 2011 | Current Osteoporosis Reports, Vol. Bone marrow lesions (BMLs) around the knee are a common magnetic resonance imaging (MRI) finding. Surgical treatment options for New York patients may vary, based on the size, type and symptoms of the hip cyst. A recommendation for terminology is provided and the relevance of these imaging findings for osteoarthritis (OA) research is emphasized. 14, No. The association did not change materially after adjusting for full-thickness cartilage loss, with an odds ratio of 12.9 (95% CI: 8.9, 18.6; P < .0001). Finally, a reading bias toward SC when a BML or an area of full-thickness cartilage loss is present cannot be ruled out completely, although the reading experience of both our experts makes this less likely. A total of 2141 subregions were finally excluded. A subchondral cyst (Fig. No statistically significant differences were found for age (P = .97) and sex (P = .68) when considering subregions with incident SCs. Degenerative cyst-like lesions in meniscus are a classic example. Per the synovial fluid intrusion theory, one would expect those scores to indicate increased risk for incident SCs in the same subregion at follow-up. 3, 27 September 2011 | Rheumatology, Vol. Furthermore, there was no apparent relationship between severity of full-thickness cartilage loss at baseline and incident SCs (Table 2). The IW fs sequence should be used for determination of lesion extent whenever the size of subchondral bone marrow edema-like lesions is the focus of attention. Baird DK, Hathcock JT, Kincaid SA, Rumph PF, Kammermann J, Widmer WR, Visco D, Sweet D: Low-field magnetic resonance imaging of early subchondral cyst-like lesions in induced cranial cruciate ligament deficient dogs. MR images were obtained in both knees at baseline and 30-month follow-up with a 1.0-T dedicated extremity unit (OrthOne; ONI Medical Systems, Wilmington, Mass) with a circumferential extremity coil by using fat-suppressed fast spin-echo proton density–weighted sequences in the sagittal (repetition time msec/echo time msec, 4800/35; 3-mm section thickness; 0-mm intersection gap; 32 sections; 288 × 192 matrix; number of signals acquired, two; 140 × 140-mm field of view; echo train length, eight) and axial (4680/13; 3-mm section thickness; 0-mm intersection gap; 20 sections; 288 × 192 matrix; number of signals acquired, two; 140 × 140-mm field of view; echo train length, eight) planes and a STIR sequence in the coronal plane (6650/15; inversion time, 100 msec; 3-mm section thickness; 0-mm intersection gap; 28 sections; 256 × 192 matrix; number of signals acquired, two; 140-mm2 field of view; echo train length, eight). 19, No. Two musculoskeletal radiologists (F.W.R. Magnetic resonance imaging (MRI) of the knee joint is one of the most commonly requested in general radiological practise examinations and belongs to the core clinical practice in most MRI units along with spinal and brain MRI. Eleven tibiofemoral subregions are defined: the central (C) and posterior (P) femur medially and laterally, the anterior (A), central, and posterior tibia medially and laterally, and the subspinous (S) region. We found a high incidence of concomitant occurrence of subchondral cysts with a ruptured anterior cruciate ligament (ACL) in all of these cases. (b) Coronal STIR MR image at 30-month follow-up demonstrates an incident SC developed in the same location (arrow). Background: Subchondral bone cysts are a widely observed, but poorly understood, feature in patients with knee osteoarthritis (OA). It is meaningful to investigate associations between subchondral bone cyst parameters (e.g., number, size, and location) and associated articular degeneration in OA pathology. According to the bone contusion theory (4,7), a subchondral cyst forms independently of the condition of adjacent cartilage. After HTO, the evolution of cysts was evaluated on MRI performed with a five year follow-up on the 72 knees with pre-operative cysts. Cartilage 14 1081–1085. SCs were defined as well-delineated areas of hyperintensity directly adjacent to the subchondral plate on STIR and proton density–weighted fat-suppressed MR images. 4, Current Opinion in Rheumatology, Vol. In a study comparing MR imaging features with histologic findings in 19 patients after hip replacement, Taljanovic et al (11) found microfractures in different stages of healing and bone marrow necrosis in 100% of patients, and 85% had bone marrow fibrosis. 6, 18 March 2011 | Rheumatology, Vol. ; clinical studies, M.D.C., F.W.R., Y.Z., C.E.L., G.Y.E., A.G.; statistical analysis, Y.Z., J.N., Y.Z., A.G.; and manuscript editing, all authors. The exact pathogenesis of these degenerative cysts is not certain. The weighted κ coefficients of interobserver reliability (studies in 30 knees randomly selected and read by both readers) were 0.66 for the readings of BMLs (comparing scores 0–3 in each subregion), 0.57 for SCs (comparing scores 0–3 in each subregion), and 0.78 for cartilage morphology (comparing scores 0–6 in each subregion). Four patellofemoral subregions are defined: the medial (M) and lateral (L) patella and the anterior subregions of the femur (trochlea) medially and laterally. Subchondral cysts are of variable size from a f… Figure 2: Coronal STIR MR image demonstrates a partial-thickness focal defect of cartilage (grade 2.0) in the central subregion of the medial femoral condyle (arrow). Typical MR imaging definition to assess SCs, 200 ( 92.6 % ) SCs. Evaluation remains often illusive seen with the patient in the same subregion of the cardinal radiological of! 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