16 . Coronal proton density (b) shows focal hypointense thickening of the talar dome (arrow). Dr. Ebraheim’s educational animated video describes Osteochondral Lesions of the Talus. Art. DOI: http://doi.org/10.5334/jbr-btr.1377, Posadzy, M., Desimpel, J., & Vanhoenacker, F. M. (2017). Coronal reformatted CBCT-A (b) demonstrates more clearly the OCL fragment (arrow) separated from the adjacent talus by thin rim of surrounding contrast (arrowheads). In particular cases also alternative diagnoses can be made on basis of CBCT (Figure 11). The articular cartilage layer of the talocrural joint is indicated in blue. The blood supply to the talus is not as rich as many other bones in the body, and as a result injuries to the talus sometimes are more difficult to heal than similar injuries in other bones. Weigelt L(1), Hartmann R(1), Pfirrmann C(2), Espinosa N(3), Wirth SH(1). Management of symptomatic osteochondral lesions of the talus (OLT) is challenging given the poor healing potential of articular cartilage. Management strategies for symptomatic osteochondral lesions of the talus are primarily surgical. Arthroscopy. The authors have no competing interests to declare. DOI: http://doi.org/10.5334/jbr-btr.1377. Studies on cadavers performed on CT arthrography [12] showed more accurate cartilage thickness measurements in comparison to standard MRI, which is in line with a superior evaluation of OCL with CT arthrographic techniques [13] (Figure 9). Past history of trauma. Commonly, this is achieved by drilling the subchondral bone (6 – 12). Presentation. Staging of Osteochondral Lesions of the Talus: MRI and Cone Beam CT. Journal of the Belgian Society of Radiology, 101(S2), 1. Dr. Ebraheim’s educational animated video describes Osteochondral Lesions of the Talus. This retrospective IRB-approved and HIPPA-compliant study included children with OLT, who underwent an ankle MRI examination between March 1, 2011, and May 31, 2018. 1991;7:101– 104. A… 1986; 68(6): 862–5. Coronal computed tomographic (CT) scan (a) and sagittal T1-weighted magnetic resonance (MR) image (b) demonstrate the normal skeletal anatomy of the foot and ankle. Based on the combination of MRI and CBCT findings the diagnosis of a subchondral insufficiency fracture (SIF) was made. Radiology. There is slight irregular delineation of the cartilage (white arrow). Radiology. Causes: Talar dome lesions are usually caused by an injury, such as an ankle sprain. An Osteochondral Lesion of the Distal Tibia and Fibula in Patients With an Osteochondral Lesion of the Talus on MRI: Prevalence, Location, and Concomitant Ligament and Tendon Injuries. A comparison of arthroscopic and MRI findings in staging of osteochondral lesions of the talus. Author information: (1)Department of Orthopedics, University Hospital Balgrist, University of Zurich, Zurich, Switzerland. The cartilage at the talar dome is slightly irregularly delineated (white arrow). ObjectiveTo determine the role of magnetic resonance imaging (MRI) MOCART (Magnetic Resonance Observation of Cartilage Repair Tissue) 1 and 2.0 scores in the assessment of … The tibia and fibula bones sit above and to the sides of the talus, forming the ankle joint. Osteochondral injury staging system for MRI attempts to grade the stability and severity of osteochondral injury and is used to plan management.. stage I. injury limited to articular cartilage; MRI findings: subchondral edema; x-ray findings: none; stage II. Open mosaicplasty in osteochondral lesions of the talus: a prospective study. Morrison, et al.Osteochondral lesions of the talus: localization and morphologic data from 424 patients using a novel anatomical grid scheme. Open mosaicplasty in osteochondral lesions of the talus: a prospective study. Isolated lesions of cartilage or subchondral bone are not considered an OCD 6. On the other hand, although MRI a very useful and sensitive technique for evaluation of the subchondral compartment (showing either BME or cyst formation), the precise depth and extent of the overlying cartilage lesion is often not accurately staged. Osteochondral lesions are relatively common in children and adolescents, and the incidence is increasing. The overlying cartilage is difficult to assess on MRI but seems to be slightly inhomogeneous (white arrow). They usually involve both the subchondral bone and the overlying articular cartilage. We report the outcome of a nonoperative treatment for symptomatic OCL. 22 (4): 765-74. At earlier stages (stage 1 to 4), a number of options exist including: The knee is a complex synovial joint that can be affected by a range of pathologies: ADVERTISEMENT: Supporters see fewer/no ads, Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. The talus is the 3rd most common site (after the knee and elbow) of osteochondral lesions. Osteochondral lesions of the talus (OLTs) are a difficult pathologic entity to treat. Conventional radiography, Mortise View (b). With the advent of MRI, this grading system was further revised including evaluation of structures invisible on conventional radiology, such as the integrity of the cartilage and presence of BME. Characterizing osteochondral lesions by magnetic resonance imaging. MRI. The overlying cartilage is intact at the talus, whereas there is subtle cartilage lesion at the distal tibia (arrow). Osteochondral lesions (osteochondritis dissecans) of the talus are common articular lesions that are usually traumatic in origin. Arthroscopic treatment of chronic osteochondral lesions of the talus: Long-term results. Foot Ankle Surg. CBCT, which was first introduced for preoperative evaluation of dental implants, is currently also used for musculoskeletal applications. CT arthrography visualizes tissue growth of osteochondral defects of the talus after microfracture. The diagnosis and investigation of such lesions have been greatly enhanced by modern high resolution magnetic resonance imaging capabilities, which have provided far greater detail of the pathological anatomy. DOI: https://doi.org/10.1016/j.fas.2013.10.005, https://doi.org/10.2106/00004623-198668060-00007, https://doi.org/10.1007/s00256-015-2127-3, https://doi.org/10.2106/00004623-195941060-00002, https://doi.org/10.1177/107110079902001206, https://doi.org/10.1016/0749-8063(91)90087-E, https://doi.org/10.2106/00004623-198971080-00004, https://doi.org/10.1007/s00167-008-0607-x, https://doi.org/10.1007/s00330-006-0446-4, https://doi.org/10.1148/radiol.2333031921. Juvenile Particulate Osteochondral Allograft for Treatment of Osteochondral Lesions of the Talus: Detection of Altered Repair Tissue Biochemical Composition Using 7 Tesla MRI and T2 Mapping. Osteochondral lesions (OCL) of the talus are defined as any damage involving both articular cartilage and subchondral bone of the talar dome. Shell osteochondral allografts of the knee: comparison of mr imaging findings and immunologic responses. • Emre et al. September 2018, Volume 15, Issue 3. J Bone Joint Surg Am. Coronal PD fat suppressed MRI image (b) revealing BME (star) in the posteromedial part of the talar dome. The purpose of this study was to investigate tissue growth after arthroscopic microfracture of OLTs using computed tomography arthrography (CTA) and to identify the relationship between CTA findings and clinical outcomes. Arthroscopy. Although Magnetic Resonance Imaging (MRI) at 1.5 Tesla is the leading cross-sectional modality for detection and staging of OCL, lack of spatial resolution hampers accurate assessment of thin articular cartilage. Osteochondral lesion of the talus in children: Are there MRI findings of instability? Similar to the Outerbridge classification widely used in staging of cartilage lesions of the knee, a modified staging system for evaluation of the depth of cartilage defects with correlation to arthroscopy may be used in the ankle (Figure 10). Schematic drawing of talocrural joint injury in pronation (a) results in sprain of the medial collateral ligaments (brown) and lateral-sided OCL of the talar dome and/or kissing tibial lesion (orange zones), whereas injury in supination (b) causes sprain of the lateral ligaments and medial-sided OCL of the talar dome and/or kissing lesions at the tibia (orange zones). You JY(1)(2), Lee GY(1)(3), Lee JW(1), Lee E(1), Kang HS(1). Background: Osteochondral lesions of the talus (OLT) are rela-tively uncommon but may be a cause of significant pain and disability. Osteochondral defects of the talus (OCD) are a well-established pathology within the ankle. Most classification systems are based on lesion descriptions by Berndt and Harty ( 2 ): If the cartilage does not heal properly following the injury, it may soften and break off. Autologous Matrix-Induced Chondrogenesis for Osteochondral Lesions of the Talus: A Clinical and Radiological 2- to 8-Year Follow-up Study. The location of the lesion at the talus is related to the mechanism of the injury and direction of the applied force (Figure 1). Prognosis of these lesions depends on stability, location, and size of the lesion.Imaging has an essential role in the diagnosis, staging, and management of osteochondral lesions. 1 ) and anterolateral (46%) talar dome ( 1 ). 2008; 36(9): 1750–62. (2018) Radiographics : a review publication of the Radiological Society of North America, Inc. 38 (5): 1478-1495. Modification of the Outerbridge classification of cartilage defects. The overlying cartilage is difficult to assess on MRI. Osteochondral Lesion of the Talus (OLT) Tracey A. Littrell, DC, DACBR, DACO, CCSP. Contributed by Dr. Hemilianna Hadassa Silva Matozinho M.D. Radiology Corner. 1991; 7(1): 101–4. 101, no. Coronal reformatted CBCT-A (c) barely shows subtle subchondral sclerosis at the superolateral aspect of the talar dome and intact overlying cartilage. Lateral radiograph shows the normal skeletal anatomy of the foot and ankle. An alternative MRI staging system has been proposed by Mintz [8] et al. Osteochondral lesions (OCL) of the talus involve both articular cartilage and subchondral bone of the talar dome. It is often associated with a traumatic injury such as a severe ankle sprain. Due to its noninvasiveness, absence of radiation exposure and its ability to visualize associated concomitant soft tissue abnormalities, MRI is the initial technique for exclusion/confirmation of an osteochondral lesion of the ankle. 6. Radiology. SCIENTIFIC ARTICLE Osteochondral lesion of the talus in children: Are there MRI findings of instability? Background: Magnetic resonance imaging (MRI) is widely used for diagnosing osteochondral lesions in the talus. Lesion size, location, chronicity, and characteristics such as displacement and the presence of subchondral cysts help dictate the appropriate treatment … Osteochondral defects (OCD) or lesions (OCL) are focal areas of damage with articular cartilage damage and injury of the adjacent subchondral bone plate and subchondral cancellous bone. In this regard, CBCT-Arthrography (CBCT-A) may be very promising technique for precise staging of cartilage lesions of the ankle as an alternative for Multi Detector Computed Tomography (MDCT). ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. Stage 1 lesion according to Anderson classification. Figure 1. C = cuneiform bone, Cal = calcaneus, Cu = cuboid bone, F = fibula, M = metatarsal bones, N = navicular bone, Ph = phalanges, STJ = posterior facet of the subtalar joint, Tb = talar body, TD = talar dome, Th = talar head, Ti = tibia, Tn = talar neck. It contains free information. Patients and methods - This study included 142 patients w … The diagnosis and investigation of such lesions have been greatly enhanced by modern high resolution magnetic resonance imaging capabilities, which have provided far greater detail of the pathological anatomy. Therefore, for more accurate evaluation of cartilage covering of articular surfaces of the talar dome and distal tibia and fibula, direct arthrographic techniques combined with CT and MRI may be useful (Figure 2d). Purpose: The purpose of our study was to investigate the performance of MRI findings to predict instability of osteochondral lesion of the talus (OLT) in children and the association between skeletal maturity and lesion stability. Treatment principles of osteochondral lesions of the talus are based on debride-ment of the chondral component and at-tempts to stimulate revascularization of the necrotic osseous component of the lesion. The purpose of this study was to directly compare the MRI with the arthroscopic findings. Outcomes are favorable after arthroscopic treatment of osteochondritis dissecans of the talus. Osteochondral lesions of the talus (OCLs/ OLTs), also called osteochondritis dissecans or osteochondral fractures, constitute a gamut of injuries to the articular surface of the. An osteochondral lesion of the talar dome is an injury involving damage to the cartilage or bony surface of the top of the talus bone (located in the ankle). focal injuries to the talar dome with variable involvement of the subchondral bone and cartilage resulting in osteochondral lesion of the talus (OLT) may be caused by … DOI: https://doi.org/10.1016/j.fas.2013.10.005, Pritsch, M, Horoshovski, H and Farine, I. Arthroscopic treatment of osteochondral lesions of the talus. MRI allows for distinguishing normal cartilage from subchondral bone as well as evaluating the adjacent bone marrow, ligaments and other surrounding soft tissues (Figure 2c). Published: September 2018 . Osteochondral lesions of the talus are relatively uncommon but may be a cause of significant pain and disability in symptomatic patients. (2)Department of Radiology, Konkuk University School … This term refers to a wide spectrum of pathologies including mild bone marrow contusion as well as severe osteoarthritis resulting from long standing disease. On plain films, the subchondral bone is seen as a thin layer of compact bone with a smooth surface and a uniform adjacent trabecular bone (Figure 2b). Example of accurate staging of the status of the articular cartilage in paediatric OCL. Recently, Cone Beam Computed Tomography (CBCT) of small joints has been introduced as an alternative technique for Multi Detector CT, combining a very high spatial resolution, low radiation dose and low cost [3]. Vira S(1), Ramme AJ(1), Chapman C(2), Xia D(3), Regatte RR(4), Chang G(5). This term covers a wide spectrum of pathologies including (sub)chondral contusion, osteochondritis dissecans, osteochondral fracture and osteoarthritis resulting from longstanding disease. Journal of the Belgian Society of Radiology 101 (S2): 1. Crossref, Medline, Google Scholar; 7 Kumai T, Takakura Y, Higashiyama I, Tamai S. Arthroscopic drilling for the treatment of osteochondral lesions of the talus. [7], who correlated MR imaging with arthroscopic appearance. There is slight irregular delineation of the cartilage (white arrow). The recognized sites of osteochondral defects are: Osteochondral injuries are graded according to the stability and location of the fragment and presence of secondary degenerative changes (see: osteochondral injury staging). The aim of this study was to summarize all eligible studies to compare the effectiveness of treatment strategies for osteochondral defects (OCD) of the talus. DOI: http://doi.org/10.5334/jbr-btr.1377, Posadzy M, Desimpel J, Vanhoenacker FM. Osteochondral defect is a broad term that describes the morphological change of a localized gap in the articular cartilage and subchondral bone 5. 2008; 16(11): 1047–51. 2. Am J Sports Med. Disqus. Direct comparison of conventional radiography and cone-beam CT in small bone and joint trauma. Retrograde drilling of osteochondral lesions of the medial talar dome. {"url":"/signup-modal-props.json?lang=us\u0026email="}, {"containerId":"expandableQuestionsContainer","displayRelatedArticles":true,"displayNextQuestion":true,"displaySkipQuestion":true,"articleId":1795,"mcqUrl":"https://radiopaedia.org/articles/osteochondral-defect/questions/571?lang=us"}. Schematic drawing shows the basic anatomy of the talocrural joint (Figure 2a). Cone Beam Computed Tomography (CBCT) arthrography is better suited for precise staging of cartilage lesions. 2007; 17(6): 1518–28. Alternative diagnosis on CBCT compared to MRI. Page 6 of 19 talar dome in the ankle joint. DOI: https://doi.org/10.1155/2016/3594253, Posadzy, M., Desimpel, J. and Vanhoenacker, F.M., 2017. This chapter is adapted from Chao W, Freeland E, Dedini R: Osteochondral Lesions of the Talus in Chou LB, ed: Orthopaedic… Journal of the Belgian Society of Radiology, vol. Schmid MR et col. Skeletal Radiology 2003 - Coupes Axiales, reconstruction dans les 3 plans - Reconstruction 3 D -Etude : - lame osseuse sous chondrale - Spongieux - Corps Etrangers et Ligaments Calcifiés - Partie molles (ligaments) Fenêtres Parties molles Axiales Fenêtres Osseuses Coronales Sagittales Scanner Forme F 3D Berndt AL, Harty M. J Bone Joint Surg 1959 … 2009 Sep;252(3):857-64. doi: 10.1148/radiol.2523081981. Coronal fat suppressed T2-WI (intermediate weighting) showing BME (white asterisk) at the lateral corner of the talar dome (a). Weigelt L(1), Hartmann R(1), Pfirrmann C(2), Espinosa N(3), Wirth SH(1). 3 c Department of Radiology, Asan Medical Center, College of Medicine , University of Ulsan , Seoul , Republic of Korea. Sagittal (a) fat suppressed T2-WI show a subchondral band-like area of low signal at the subchondral cortex (white arrow) with surrounding BME (white asterisk). 1 ) and anterolateral (46%) talar dome ( 1 ). Many of these lesions are first diagnosed by plain film. This is essential in determining management. Osteochondral lesions of the talus Few patients require surgery Sang Gyo SEO 1, Jin Soo KIM , Dong-Kyo SEO 2, You Keun KIM 1, Sang-Hoon LEE 3, and Ho Seong LEE 1 Department of Orthopedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul; 2 Department of Orthopedic Surgery, Background and purpose - The frequency of progression of osteoarthritis and persistence of symptoms in untreated osteochondral lesion of the talus (OCL) is not well known. Arthroscopy. Osteonecrosis can develop when the lesion’s vascularity is disrupted. in 2003. 1, pp. Arthroscopic evaluation of the cartilage is regarded as the gold standard [2], but due to its invasiveness and the need for anesthesia, it should be reserved for preoperatively well-documented cases and combined with surgical treatment procedures. MRI of osteochondral defects of the lateral femoral condyle: incidence and pattern of injury after transient lateral dislocation of the patella. Nowadays MR staging of OCL on MRI is usually done by the Anderson classification [9], which is another modification of the initial staging system based on plain film evaluation by Berndt and Harty (Figure 6). The purpose of this pictorial review is to illustrate the strength of each imaging method. Medline, Google Scholar 2004; 233(3): 768–73. Osteochondral lesions (OCL) of the talus are defined as any damage involving both articular cartilage and subchondral bone of the talar dome. The red arrow indicates the direction of the applied force. Materials and method: This retrospective IRB-approved and HIPPA-compliant study included children with OLT, who underwent an ankle MRI examination between March … It combines high spatial resolution, relatively low radiation dose and low equipment cost and is useful for evaluation of trauma of small bones and joints, particularly when there is clinical suspicion for a fracture despite negative plain radiographs [3]. The talus is the 3rd most common site (after the knee and elbow) of osteochondral lesions. The majority of those lesions occur in active patients and are related to trauma. Osteochondral lesions of the talus present a numerically small but therapeutically significant problem to the foot surgeon. (2020) Skeletal Radiology. Treatment depends on the location and size of the defect as well as the presence of secondary degenerative changes. Osteochondral lesions of the talus (OLTs) are lesions of the articular cartilage of the talus and underlying subchondral bone. Osteochondral Lesions of the Talus with Midfoot Arthritis (C2537) Gilberto Consoli Foot & Ankle - Osteochondral Lesions of the Talus E 3/20/2016 604 . A modified grading system has been proposed by Hepple in 1999 [5] and by Dipaola et al. • Goh GSH et al. Home MRI Musculoskeletal MRI Musculoskeletal radiology Osteochondral Defect. Due to the widespread use of fluid-sensitive sequences on MRI, even subtle foci of BME may be seen adjacent to a cartilage defect, particularly in acute or subacute OCL lesions. CBCT following intra-articular injection of Iodine contrast (CBCT-Arthrography) may render exquisite detail of the articular cartilage using very thin slices and multiplanar reformation. The purpose of our study was to investigate the performance of MRI findings to predict instability of osteochondral lesion of the talus (OLT) in children and the association between skeletal maturity and lesion stability. Although the majority of patients have an osteochon-dral lesion of the talus that is unilateral, bilateral involvement has been reported in 10% to 25% of cases. The most common sites are the posteromedial (53%) ( Fig. J Bone Joint Surg Am 1999; 81:1229-1235. DOI: https://doi.org/10.1007/s00256-015-2127-3, Berndt, AL and Harty, M. Transchondral fractures (osteochondritis dissecans) of the talus. 1959; 41–A: 988–1020. Compared to the articular cartilage of the knee, cartilage of the ankle joint is very thin and the spatial resolution of MRI may be insufficient for detection of small lesions. DOI: http://doi.org/10.5334/jbr-btr.1377, Posadzy, Magdalena, Julie Desimpel, and Filip M. Vanhoenacker. Coronal (c, d) reformatted CBCT-A clearly shows an extensive cartilage lesion down to bone with adjacent cartilage flap (black arrow). Kaplan P. Musculoskeletal MRI. Staging of Osteochondral Lesions of the Talus: MRI and Cone Beam CT. Journal of the Belgian Society of Radiology. The equipment is designed to perform exams in sitting or supine position and is relatively compact, allowing installation in many radiology departments and private practices. DOI: https://doi.org/10.2106/00004623-198971080-00004, Lee, KB, Bai, LB, Park, JG and Yoon, TR. 17 Osteochondral Lesions of the Talus MARK E. EASLEY, STEVEN D. SIDES, AND ALISON P. TOTH Treatment of symptomatic focal talar osteochondral defects has undergone a dramatic evolution over the past decade. Example of improved visualization of communication of subchondral cysts with the joint through deep articular cartilage lesions on CBCT arthrography. In adult patients, the depth of the cartilage lesions is often understaged (Figures 3 and 4). Posadzy M, Desimpel J, Vanhoenacker FM. We aimed to examine whether CLAI is associated with the size and staging of medial OLT on radiographs, … Accurate physiotherapy diagnosis in addition to an appropriate physiotherapy rehabilitation program is essential to ensure an optimal outcome. Longtemps, leur terminologie fut confuse et l’étiopathogénie est restée un sujet controversé. Author information: (1)Department of Orthopedics, University Hospital Balgrist, University of Zurich, Zurich, Switzerland. Jung HG(1), Kim NR(2), Jeon JY(3), Lee DO(4), Eom JS(1), Lee JS(1), Kim SW(1). Sagittal fat suppressed T2-WI (intermediate weighting) showing BME (white asterisk) at the lateral corner of the talar dome (b). Large uncontained lesions are usually painful as the structure of the talus is threatened. DOI: http://doi.org/10.5334/jbr-btr.1377, Posadzy M, Desimpel J and Vanhoenacker FM, ‘Staging of Osteochondral Lesions of the Talus: MRI and Cone Beam CT’ (2017) 101 Journal of the Belgian Society of Radiology 1 DOI: http://doi.org/10.5334/jbr-btr.1377, Posadzy, Magdalena, Julie Desimpel, and Filip M. Vanhoenacker. Les lésions ostéochondrales du talus occupent une place à part au sein de la traumatologie de la cheville, que ce soit pour leur diagnostic ou leur traitement. Chronic osteochondral lesion of the talus after ankle trauma. First mover in Radiology & Web 2.0. “Staging of Osteochondral Lesions of the Talus: MRI and Cone Beam CT”. J Bone Joint Surg Am. Coronal PD fat suppressed coronal image (a) showing an OCL fragment completely detached from talar dome without displacement (arrow), bone marrow oedema (star) of adjacent part of the talus. The accuracy also depends of the strength of the field and is lower on 1.5 Tesla magnets in comparison to 3T [11]. We studied the value of MR imaging in determining the stability of the osteochondral fragments. Sagittal (a) and coronal (b) fat suppressed T2-WI showing multilocular subchondral cysts (black arrowheads) at the medial aspect of the talar dome. Although Conventional Radiography (CR) is still the initial diagnostic modality used for evaluation of ankle pain, later studies showed that 30–43% of talar OCL diagnosed on MRI were invisible on CR [5]. They are most commonly associated with ankle trauma and wh… It uses a conical X-ray beam and flat-panel detector collecting all volumetric data in one rotation of the gantry. Sirlin CB, Brossmann J, Boutin RD et-al. Osteochondral lesion of talus. DOI: https://doi.org/10.1007/s00167-008-0607-x, Barr, C, Bauer, JS, Malfair, D, Ma, B, Henning, TD, Steinbach, L, et al. The first system of classification has been reported by Berndt and Harty in 1959 [4], including four stages based on their radiological appearance. Both x-rays and CT are able to detect displaced defects with ease. Radiology: Volume 252: ... drilling of osteochondral lesions of the talus with MR guidance. MRI coronal PD fat suppressed image (1.5 Tesla equipment) of the talocrural joint (c) with normal appearance of the thin cartilage layer (arrows) of intermediate signal, low signal of subchondral bone and homogenous bone marrow signal (stars). S2, 2017, p. 1. Outcomes are favorable after arthroscopic treatment of osteochondritis dissecans of the talus. Smooth articular surfaces (arrows) of the talocrural joint with normal trabecular bone appearance (stars). Eur Radiol. “Osteo” means bone and “chondral” refers to cartilage. In stage 3 an undisplaced completely separated fragment can be seen on MRI with adjacent BME. This is referred to as an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). Art. Articular cartilage lining remains homogenous without any signal changes (Figure 7). Cartilage thickness in cadaveric ankles: Measurement with double-contrast multi-detector row CT arthrography versus MR imaging. Https: //doi.org/10.1007/s00256-015-2127-3, Berndt, al and Harty, M., Desimpel, flake!: osteochondritis dissecans of the talus c ) barely shows subtle subchondral sclerosis at distal. ( MRI ) is not well known and Cone Beam CT ” the presence of intraarticular contrast and spatial... Subchondral sclerosis at the talar dome of trauma up to 70 % of acute ankle sprains fractures... Are able to detect displaced defects with ease KB, Bai, LB, Park, JG and Yoon TR! Minimally invasive treatment postoperative knee: Differentiating the most common Entities at MRI opinion... Systems are based on lesion descriptions by Berndt and Harty ( 2 ): Home MRI Musculoskeletal Musculoskeletal. The development of OCLs include trauma, ischemia,... W.B morphological change of subchondral. 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