{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T23:49:42Z","timestamp":1793231382926,"version":"4.5.0"},"reference-count":37,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2013,1,31]],"date-time":"2013-01-31T00:00:00Z","timestamp":1359590400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2013,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The best treatment for Achilles tendon (AT) ruptures remains controversial. Long\u2010term follow\u2010up with radiological and clinical measurements is needed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this retrospective multicentre cohort study, patients (<jats:italic>n<\/jats:italic> = 52) were assessed at a mean of 91\u00a0months follow\u2010up after unilateral AT rupture treated by open, percutaneous or conservative (non\u2010surgical) treatment. Demographic parameters, time off work, maximum calf circumference and clinical scores (ATRS, Hannover, AOFAS) were evaluated. Muscle volume and cross\u2010sectional area of the calf and AT length were measured on MR images and were compared between groups and to each patient\u2019s healthy contralateral leg.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Reduced muscle volume was found across all groups with a higher muscle volume in the conservative (729.9 \u00b1 130.3\u00a0cm<jats:sup>3<\/jats:sup>) compared to the percutaneous group (675.9 \u00b1 207.4\u00a0cm<jats:sup>3<\/jats:sup>, <jats:italic>p<\/jats:italic> = 0.04). AT length was longer in the affected leg (198.4 \u00b1 24.1 vs. 180.6 \u00b1 25.0\u00a0mm, <jats:italic>p<\/jats:italic> <jats:italic>&lt;<\/jats:italic> 0.0001) without difference in subgroup analysis. Clinically measured ankle dorsiflexion showed poor correlation with AT length (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> = 0.07, <jats:italic>p<\/jats:italic> = 0.008). Muscle volume strongly correlated with the cross\u2010sectional area (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> = 0.6, <jats:italic>p<\/jats:italic> &lt; 0.0001) but showed a weak correlation with the Hannover score (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> = 0.08, <jats:italic>p<\/jats:italic> = 0.048). Maximum calf circumference correlated with muscle volume (<jats:italic>R<\/jats:italic><jats:sup>2<\/jats:sup> = 0.42, <jats:italic>p<\/jats:italic> <jats:italic>&lt;<\/jats:italic> 0.0001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>No significant difference between the treatment groups was found in muscle volume, AT length, clinical measures or days off work. Cross\u2010sectional area and maximum calf circumference are cost\u2010effective measurements and a good approximation of muscle volume and can thus be used in a clinical setting while clinical dorsiflexion should not be used.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>III.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-013-2407-1","type":"journal-article","created":{"date-parts":[[2013,1,30]],"date-time":"2013-01-30T05:51:16Z","timestamp":1359525076000},"page":"1369-1377","source":"Crossref","is-referenced-by-count":73,"title":["Long\u2010term outcomes of muscle volume and Achilles tendon length after Achilles tendon ruptures"],"prefix":"10.1002","volume":"21","author":[{"given":"Claudio","family":"Rosso","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick","family":"Vavken","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel Switzerland"},{"name":"<!--<label>3<\/label>--> Harvard School of Public Health Boston MA USA"},{"name":"<!--<label>4<\/label>--> Children\u2019s Hospital Boston Harvard Medical School Boston MA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Caroline","family":"Polzer","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel M.","family":"Buckland","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel Switzerland"},{"name":"<!--<label>2<\/label>--> Center for Advanced Orthopaedic Studies Beth Israel Deaconess Medical Center, Harvard Medical School Boston MA USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ueli","family":"Studler","sequence":"additional","affiliation":[{"name":"<!--<label>6<\/label>--> Department of Radiology University Hospital Basel, University of Basel Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lukas","family":"Weisskopf","sequence":"additional","affiliation":[{"name":"<!--<label>5<\/label>--> Rennbahn Clinic Muttenz Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marc","family":"Lottenbach","sequence":"additional","affiliation":[{"name":"<!--<label>7<\/label>--> Cantons Hospital Fribourg Fribourg Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas Marc","family":"M\u00fcller","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Victor","family":"Valderrabano","sequence":"additional","affiliation":[{"name":"<!--<label>1<\/label>--> Orthopaedic Department University Hospital Basel and University of Basel Spitalstrasse 21 4031 Basel 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