Accuracy
of MRI in the Diagnosis of Meniscal Lesions
Introduction
Menisci
- internal structures of the knee frequent interested in traumatic
pathology
Posttraumatic and degenerative lesions -
frequent in young and active persons
Related with
sports activities
Posterior horn of medial
meniscus is frequent interested
Introduction
-
Imaging
MRI is the primary imaging modality
high
resolution
soft tissue contrast
multiplanar
capabilities
3.500
MR examination/ year
~ 14% knee
MR examination (400)
Intraarticular
and extraarticular structures |  |
MRI -
diagnosis and characterisation of meniscal
tears
- lesion
location, size, shape
-
presence and dimension of a displaced meniscal fragment
-
associated lesions
B. C. Vande Berg- AJR 2001;
176:771-776
A reported
accuracy for detection
of meniscal
tears of 90-95%
Helms
C.A. Radiology 2002; 224: 631-635 |  |
Internal meniscal tears
- 42-year-old male External
meniscal tears - 25-year-old male (clck to enlarge!) Results:
19
patients- bilateral
meniscal lesions
| Se% | Sp% | ROC-Az
(CI95%) | | Both
menisci | 69 | 87 | .836
(.79- .88) |
| ROC
curves for both menisci |
Internal
meniscal tears - 29-year-old female -
External meniscal tears
Conclusion
MR imaging is an accurate technique in evaluation of meniscal
tears in patients with knee trauma being an useful tool in
preoperative assessment
August
10,
2009
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