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Clinical variables included history of present illness (HPI), medical history, and physical examination findings. Radiographic variables included Kellgren\u2010Lawrence grade, bone bruise, ghost sign, truncation sign, linear hyperintensity perpendicular to the meniscus, meniscal extrusion, tibial slope, and mechanical axis. Patients were stratified by inciting event versus insidious onset for subgroup analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Of 72 patients (mean age 56.7 \u00b1 8.9 years, mean BMI 32.3 \u00b1 5.7 k\/m\n                      <jats:sup>2<\/jats:sup>\n                      ), recollection of an inciting event was reported in 45.8% of patients. The most prevalent findings in the HPI were knee swelling (72.2%) followed by mechanical symptoms (62.5%) and episodes of perceived instability (45.8%), whereas medial joint line tenderness (93.1%) and a positive McMurray\u2019s test (69.4%) were commonly observed on physical examination. On MRI, ghost sign was identified in 91.7% of cases followed by truncation sign (83.3%) and a linear signal perpendicular to the meniscus (68.1%). The average measured meniscal extrusion was 4.18 \u00b1 1.09 mm. Cases with an inciting event were more likely to be younger (\n                      <jats:italic>P<\/jats:italic>\n                      = .021), present acutely (\n                      <jats:italic>P<\/jats:italic>\n                      = .039), and have a positive McMurray test (\n                      <jats:italic>P<\/jats:italic>\n                      = .036). Cases with an insidious presentation were found to have higher rates of bone bruising at the medial femoral condyle (\n                      <jats:italic>P<\/jats:italic>\n                      = .016) and medial plateau (\n                      <jats:italic>P<\/jats:italic>\n                      = 0.029).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Patients with MMPRT associated with an inciting event are typically younger and more likely to present acutely, with a positive McMurray\u2019s test. Conversely, patients with insidious presentation are older, present chronically, and exhibit higher rates of bone bruising, particularly when there is varus malalignment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>Level IV, prognostic case series.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.asmr.2025.101118","type":"journal-article","created":{"date-parts":[[2025,3,27]],"date-time":"2025-03-27T05:41:56Z","timestamp":1743054116000},"update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":3,"title":["Traumatic Onset of Medial Meniscus Posterior Root Tears Is Associated With Younger Age While Insidious Onset Is Associated With Chronic Overload and Bone Bruising"],"prefix":"10.1002","volume":"7","author":[{"given":"Rodrigo Saad","family":"Berreta","sequence":"first","affiliation":[{"name":"Department 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U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ashwinee","family":"Manivannan","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Rush University Medical College Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan Bernardo","family":"Villarreal\u2010Espinosa","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Rush University Medical Center Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Salvador","family":"Ayala","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Rush University Medical Center Chicago Illinois U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Rafael","family":"Gracia","sequence":"additional","affiliation":[{"name":"Department of Orthopaedics Rush University Medical Center Chicago Illinois 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