Name : Morteza
Family : Sanei Taheri
Affiliation :Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree : Associate Professor of Radiology
Resident : Afarin Sadeghian
Gender : Female
Age : 29
29-year-old woman with knee pain
In one of the sagittal plane images,absent meniscus in the location of posterior horn of medial meniscus suggest radial tear of meniscus(Absent or Empty meniscus).Coronal plane image demonstrate that the radial tear located at the meniscal root indicating meniscal root tear.
1.Meniscal root tear,2.Post-operative meniscus
Meniscal root tear
Discussion (Related Text)
Radial tears are perpendicular to the long axis of the meniscus. They violate the collagen bundles that parallel the long axis of the meniscus. These are high energy tears. They start at the inner margin and go either partial or all the way through the meniscus dividing the meniscus into a front and a back piece.Radial tears are difficult to recognize. You have to combine the findings on sagittal and coronal images to make the diagnosis.
Rubin DA, Kettering JM, Towers JD, Britton CA: MR imaging of knees having isolated and combined ligament injuries. AJR, 1998; 170:1207-1213