29-year-old woman with knee pain

Images

Doctor's Information

Name : Morteza
Family : Sanei Taheri
Affiliation :Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree : Associate Professor of Radiology
Email : This email address is being protected from spambots. You need JavaScript enabled to view it.
Resident : Afarin Sadeghian

Case Section

Muskuloskeletal System

Patient's Information

Gender : Female
Age : 29

Clinical Summary

29-year-old woman with knee pain

Imaging Findings

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.

Differential Diagnosis

1.Meniscal root tear,2.Post-operative meniscus

Final Diagnosis

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.

References

Rubin DA, Kettering JM, Towers JD, Britton CA: MR imaging of knees having isolated and combined ligament injuries. AJR, 1998; 170:1207-1213