Ankle impingement syndromes are caused by the friction of joint tissues, which is both the cause and the effect of altered joint biomechanics resulting in chronic ankle pain . From anatomic and clinical viewpoints, these syndromes are classified as anterolateral, anterior, anteromedial, posteromedial, and posterior . In the present study, we evaluated imaging features of subtalar ligaments in STI patents using 3D isotropic T2-weighted MRI. In addition, we compared MRI findings of subtalar ligaments between STI patients and controls. Quantitatively, STI patients had significantly smaller ACL in terms of thickness and width. In the control group, ACL width and thickness were 8.80 mm and 2.22 mm, respectively, similar to previous cadaver-study results (width of 10.1 mm and thickness of 2.4 mm) . However, ACL thickness and width were significantly different between STI patient and control groups.

In a cadaver study, ITCL thicknesses has been reported to be 2.3–3.0 mm with width of 8.5–11.0 mm . In addition, medial roots of IER are known to be blended with fibers of ITCL to form a V-shaped large ligamentous lamina in the tarsal sinus . Likewise, we found that the ITCL was mixed with medial roots of the IER in most cases. The reason that the ITCL width was relatively narrower than previously reported might be due to the fact that only main fiber bundles of ITCL that were clearly visualized on 3D isotropic MRI were measured. Mean height, weight, and BMI of STI patients were 168.6 ± 10.5 cm, 71.1 ± 13.4 kg, and 24.9 ± 3.8 kg/m2, respectively. All 23 ankles had previous ankle sprain history and preoperative symptomatic recurrent ankle sprain.

They showed positive STI findings with marked widening of the subtalar joint. Chronic tears in the interosseous ligament were recorded in all cases during subtalar arthroscopy. For 10 cases diagnosed with both LAI and STI, the Broström procedure was also performed in addition to subtalar reconstruction. Semi-tendinous allograft was used to reconstruct anterior and posterior CFL during subtalar reconstruction surgery .

Edema and fluid intensity signal are present in the sinus tarsi posterior to the cervical ligament. The roots of the inferior extensor retinaculum are not identifiable, consistent with tear. Case 17 – Chronic sprain of cervical ligament, sinus tarsi fibrosis. Axial and sagittal T1-weighted images demonstrate hypointense fibrosis in the sinus tarsi.

4.Thomas H, Malone TR, Lynn N. Musculoskeletal imaging companion. To access 4,300 diagnoses written by the world’s leading experts in radiology. This is a chest CT image of a young male with fever, recurrent straight hair twists cough. CT chest shows well defined area in left lower lobe with cystic comp… Maffucci syndrome is characterized by benign enlargements of cartilage ; bone deformities; and dark, irregularly shaped…

The ATFL runs from the lateral malleolus anteriorly to the lateral border of the talus. In C – the anterior syndesmosis is thickened and there probably is a focal discontinuity and that is the reason why this was called a grade 3 injury . This patient has secundary degenerative changes in the joint with subchondral edema and cyst formation. The right image shows massive joint effusion as a reaction to degenerative osteochondral defects in the tibiotalar joint. This case is shown to demonstrate the great variety of ossicles and tubercles on the posterior side of the talus. The os trigonum is present in the normal population in about 5-15%.

PTFL is the least commonly injured ligament, isolated injuries are rare and most PTFL tears occur in presence of ATFL, CFL tears with extreme ankle dislocation. Magnetic resonance imaging is the best method to visualize the structure and theirs alterations within the sinus tarsi. The use of ice massage over the lateral ankle may be useful to diminish inflammation and pain. Coronal T1W MRI shows effacement of normal fat with hypointensity in the left tarsal canal and sinus tarsi. CT images of the left ankle revealed irregularity with erosions and subchondral cysts involving the inferior aspect of the talus and superior and anterior aspects of the calcaneus.

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