Unilateral Subtalar Coalition: Contralateral Sustentaculum Tali Morphology

Bixby, Sarah D.; Jarrett, Delma Y.; Matheney, Travis; Johnston, Patrick; Kasser, James R.; Kleinman, Paul K.

doi:10.1148/radiol.10092222

Cited by 6 publications

(9 citation statements)

References 18 publications

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“…abnormalities, including subtalar coalition (15), slipped capital femoral epiphysis (16), and trochlear dysplasia, (17) and, therefore, elucidation of a primary morphologic abnormality of the currently asymptomatic contralateral patellofemoral joints may provide insight into the underlying predisposing factors for PI. Additionally, these underlying anatomic and functional abnormalities may predispose the contralateral asymptomatic joints to future anterior knee pain, instability, and OA.…”

Section: Discussionmentioning

confidence: 99%

Imaging Characteristics of Contralateral Asymptomatic Patellofemoral Joints in Patients with Unilateral Instability

Demehri¹,

Thawait²,

Williams³

et al. 2014

Radiology

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).q RSNA, 2014 Purpose:To test the hypothesis that in patients with unilateral patellofemoral instability (PI), the contralateral asymptomatic joints have abnormal morphology and imaging features of osteoarthritis (OA) at four-dimensional (4D) computed tomography (CT). Materials and Methods:The institutional review board approved this HIPAA-compliant retrospective study. Informed consent was waived. Radiology records were reviewed to identify 25 patients (male-female ratio, 0.56; median age, 20 years; range, 13-43 years) with unilateral PI undergoing 4D CT and 25 age-and sex-matched control patients undergoing multidetector CT. Trochlear groove depth (TGD), tibial tuberosity-trochlear groove (TT-TG) distance, and patellar height ratio (PHR) were determined to compare morphology, and bisect offset (BO) measurements were obtained to compare lateral displacement of the patella between the two groups by using the Wilcoxon rank-sum test. All images were interpreted by trained observers. Tracking patterns of the patellae were determined by obtaining BO measurements at various flexion angles with 4D CT. Results:In the contralateral asymptomatic joints, TGD (median, 3.0 mm; 95% confidence interval [CI]: 2.5, 4.6; P , .0001), TT-TG (median, 15 mm; 95% CI: 12.7, 18; P = .008), PHR (median, 1.17; 95% CI: 1.09, 1.2; P = .002), and patellar lateral displacement (BO, 85%; 95% CI: 76.2%, 98.2%; P , .0001) were different from measurements obtained in the control group: TGD median, 5.0 mm (95% CI: 2.2, 7.6); TT-TG median, 10.9 mm (95% CI: 3.4, 20.7); PHR median, 0.92 (95% CI: 0.67, 1.36); and BO median, 63% (95% CI: 59%, 68.4%). OA was detected in 40% of asymmetrical contralateral joints (10 of 25). By using 4D CT data, multiple regression analysis demonstrated that TGD (P = .026) and BO measurements obtained at 30° of knee flexion (P = .047) had an association with the presence of OA. Conclusion:Abnormal morphology and imaging features of OA are relatively common in contralateral asymptomatic joints of young patients with unilateral PI.q RSNA, 2014

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Section: Discussionmentioning

confidence: 99%

Imaging Characteristics of Contralateral Asymptomatic Patellofemoral Joints in Patients with Unilateral Instability

Demehri¹,

Thawait²,

Williams³

et al. 2014

Radiology

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“…22 In this study, the incidence of tarsal coalition is 14%, which is similar to other studies (1-13%). 6,8,9 A main cause of tarsal coalition is the failure of mesenchymal separation, presenting fibrous, cartilaginous, or osseous bridging. 10,11 The precise location of tarsal coalition is essential for surgical decisions.…”

Section: Discussionmentioning

confidence: 99%

“…7 Talocalcaneal coalition is the second most common type of subtalar coalition, with an incidence of 1-13%, in which MTF is commonly involved. 6,8,9 However, the anatomical structures of subtalar coalitions were not described in detail. Therefore, the aim of this study is to explore the quantitative morphology of STs in dried bone specimens, and to discuss their implications relative to ST screw fixation, talar articular facet variation, and subtalar coalition.…”

Section: Introductionmentioning

confidence: 99%

Sustentaculum tali in Chinese population: anatomy and clinical significance

Liao

Feng

Yang

et al. 2023

J Orthop Surg (Hong Kong)

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Background Previous studies lacked adequate quantitative data on sustentaculum tali (ST), especially in Chinese population. The aims of this study are to explore the quantitative morphology of ST in dried bone specimens, and to discuss its implications related to ST screw fixation, talar articular facet variation, as well as subtalar coalitions. Methods A total of 965 dried intact calcanei from Chinese adult donors were evaluated. All linear parameters were measured by two observers with a digital sliding vernier caliper. Results Most parts of ST body can accommodate a commonly-used 4-mm-diameter screw, but the minimum height of anterior ST is only 4.02 mm. The shapes of the STs are slightly affected by left-right, subtalar facet, but the subtalar coalition may potentially increase the sizes of STs. The incidence of tarsal coalition is 14.09%. Among the osseous connection, there are 58.8% of type A articular surface and 76.5% of middle and posterior talar facet (MTF and PTF) involvement. ROC curve shows that subtalar coalition will be detected when ST length is greater than 16.815 mm. Conclusions Theoretically, all the STs can accommodate 4 mm diameter screw, but a 3.5 mm diameter screw is recommended to be placed in the middle or posterior of the small ST for safety. The shapes of the STs are greatly influenced by the subtalar coalition, while they are less affected by left-right, subtalar facet. The osseous connection is common in type A articular surface and always involved in the MTF and PTF. The cut-off value of the length of STs was confirmed as 16.815 mm for predicting subtalar coalition.

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“…13,15 In patients with unilateral tarsal coalitions, a larger sustentaculum tali and hypoplastic middle facet are often identified in the contralateral foot. 16 Symptoms arise from the loss of flexibility of the tarsus as the coalition ossifies. Talocalcaneal coalitions ossify between 12 and 16 years of age and calcaneonavicular coalitions between 8 and 12 years.…”

Section: Tarsal Coalitionsmentioning

confidence: 99%

Ankle and Foot Injuries in the Young Athlete

Chauvin

Jaimes

Khwaja

2018

Semin Musculoskelet Radiol

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Injuries to the ankle and foot are common in the young athlete, especially with increasing participation and high levels of competitiveness in youth sports programs. Knowledge of the normal development of the foot and ankle is crucial to understand age-specific injury patterns because acute or chronic/repetitive stress to the developing skeleton results in injuries that differ from those seen in adults. Congenital abnormalities may also predispose children to increased risk of injury and pain. Radiologists must be aware of these distinctions to diagnose and classify injuries correctly for optimum treatment. We describe common and unique foot and ankle injuries in the young athlete. Throughout the article we focus not only on imaging findings but also on the mechanism of injury.

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Unilateral Subtalar Coalition: Contralateral Sustentaculum Tali Morphology

Cited by 6 publications

References 18 publications

Imaging Characteristics of Contralateral Asymptomatic Patellofemoral Joints in Patients with Unilateral Instability

Imaging Characteristics of Contralateral Asymptomatic Patellofemoral Joints in Patients with Unilateral Instability

Sustentaculum tali in Chinese population: anatomy and clinical significance

Ankle and Foot Injuries in the Young Athlete

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