{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T05:15:55Z","timestamp":1777612555044,"version":"3.51.4"},"reference-count":31,"publisher":"SAGE Publications","issue":"11","license":[{"start":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T00:00:00Z","timestamp":1758585600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,9,23]],"date-time":"2025-09-23T00:00:00Z","timestamp":1758585600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Foot Ankle Int."],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Progressive collapsing foot deformity (PCFD) is a complex condition characterized by progressive ligamentous and osseous changes in the hindfoot, midfoot, and forefoot. Although osseous changes at the subtalar and transverse tarsal joints have been well studied, ligamentous anatomy in PCFD is less understood. This study evaluates the cervical, interosseous talocalcaneal, and superomedial fibers of the spring ligament in patients with PCFD vs controls using magnetic resonance imaging (MRI) analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>\n                      Nonweightbearing MRI and weightbearing radiographs of 39 patients (23 PCFD, 16 controls) were retrospectively reviewed. MRIs measured the coronal plane orientation of the interosseous talocalcaneal, cervical, and superomedial spring ligaments relative to the subtalar joint middle facet. Radiographic data included anteroposterior (AP) talonavicular coverage percentage, AP talocalcaneal angle (Kite), lateral talar\u2013first metatarsal angle (Meary), talar declination angle, and calcaneal pitch. Two observers measured each radiographic and MRI angle. Statistical analysis included an independent\n                      <jats:italic toggle=\"yes\">t<\/jats:italic>\n                      test and intraclass correlation coefficient (ICC) to assess interobserver reliability.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      PCFD patients demonstrated significantly more horizontal ligament orientations than controls, with reduced cervical (25.5 vs 45 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001), superomedial spring (11.5 vs 23.1 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001), and interosseous talocalcaneal ligament angles (39.5 vs 49.0 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.005). Radiographically, PCFD patients had decreased talonavicular coverage (64.5% vs 80.9%,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001), increased Meary angle (22.2 vs \u22122.3 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001), increased talar declination (37.0 vs 20.6 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001), increased Kite angle (20.7 vs 17.2 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.079), and decreased calcaneal pitch (15.5 vs 24.6 degrees,\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009&lt;\u2009.001). Interobserver reliability was excellent, with ICC values exceeding 0.94 for all measurements except interosseous talocalcaneal ligament angle (ICC\u2009=\u20090.83).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>On nonweightbearing MRI, PCFD patients showed more horizontal orientation of key subtalar ligaments than controls; whether these differences persist under physiologic load should be confirmed with weightbearing imaging.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/10711007251363927","type":"journal-article","created":{"date-parts":[[2025,9,24]],"date-time":"2025-09-24T04:44:18Z","timestamp":1758689058000},"page":"1275-1281","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["MRI Evaluation of Cervical, Spring, and Interosseous Talocalcaneal Ligament Orientation in Progressive Collapsing Foot Deformity"],"prefix":"10.1177","volume":"46","author":[{"ORCID":"https:\/\/orcid.org\/0009-0008-7874-775X","authenticated-orcid":false,"given":"Alexander","family":"Chang","sequence":"first","affiliation":[{"name":"University of California, San Diego, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8087-3327","authenticated-orcid":false,"given":"Brady","family":"Huang","sequence":"additional","affiliation":[{"name":"University of California, San Diego, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6805-2275","authenticated-orcid":false,"given":"Ian","family":"Foran","sequence":"additional","affiliation":[{"name":"University of California, San Diego, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2025,9,23]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1177\/10711007241231221"},{"key":"e_1_3_2_3_2","unstructured":"Arain A Harrington MC Rosenbaum AJ. Progressive collapsing foot deformity. In: StatPearls. StatPearls Publishing; 2025. 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