Popliteal meniscal fiber bundle injury is relatively infrequent in clinic, which can be either isolated or associated with anterior cruciate ligament rupture, lateral meniscus injury and so on. Popliteal meniscal fiber bundle injury often leads to instability of lateral meniscus. Because of the lack of specific symptoms and signs of injury, the imaging changes are subtle, and it is easy to miss diagnosis and misdiagnosis in clinical. Timely diagnosis and treatment are essential to prevent the chronic pain and instability of the knee joint. This paper summarizes the anatomical characteristics, biomechanics, injury mechanism, diagnostic points and surgical treatment of the popliteal meniscus fiber bundle injury, in order to guide the diagnosis and treatment of the injury of the popliteal meniscus fiber bundle in the clinical work.
Anterior Cruciate Ligament Injuries ; Humans ; Knee Injuries ; Knee Joint ; Menisci, Tibial ; Tibial Meniscus Injuries ; diagnosis

Ligamentous injuries of the lower limb are a common entity sustained during sports activities and military training. Magnetic resonance (MR) imaging of the knee and ankle is playing an increasingly important role in the detection, diagnosis and prognosis of these injuries and their associated complications. MR imaging with its exquisite soft tissue contrast resolution and multiplanar capability is increasingly seen as the modality of choice for evaluating ligamentous injuries of the knee and ankle. Representative knee and ankle MR studies from a tertiary referral hospital are used to illustrate both the normal appearance and typical radiological features of common ligamentous injuries of the knee and ankle. A thorough understanding of the MR appearances of these injuries is crucial to the radiologist and clinicians involved in the management of these patients.
Ankle Injuries ; diagnosis ; Athletic Injuries ; Humans ; Knee Injuries ; diagnosis ; Ligaments, Articular ; injuries ; physiopathology ; Magnetic Resonance Imaging

Anterior Cruciate Ligament Injuries ; Humans ; Knee Injuries ; diagnosis ; surgery ; Medial Collateral Ligament, Knee ; injuries ; Posterior Cruciate Ligament ; injuries

Knee injury is one of the most common sports-related injuries, especially in young athletic patients. Most injuries can be managed conservatively with good results, and nowadays growing interest is paid for rehabilitation program. However, careful physical examination, differential diagnosis and thorough understanding of disease outcome are necessary to make successful treatment decisions. We will review the diagnosis and classification of various conditions of knee injuries, and rehabilitation treatment for acute and chronic sports-related knee injuries.
Athletic Injuries ; Diagnosis, Differential ; Humans ; Knee ; Knee Injuries ; Physical Examination ; Sports

Knee injury is one of the most common sports-related injuries, especially in young athletic patients. Most injuries can be managed conservatively with good results, and nowadays growing interest is paid for rehabilitation program. However, careful physical examination, differential diagnosis and thorough understanding of disease outcome are necessary to make successful treatment decisions. We will review the diagnosis and classification of various conditions of knee injuries, and rehabilitation treatment for acute and chronic sports-related knee injuries.
Athletic Injuries ; Diagnosis, Differential ; Humans ; Knee ; Knee Injuries ; Physical Examination ; Sports

PURPOSE: To evaluate the role of standard axial MR images for the diagnosis of meniscal tears of the knee. MATERIALS AND METHODS: Forty-five patients with a prior MRI examination that underwent arthroscopic surgery of the knee due to clinical impression of a meniscal tear were included in the study group. The sequence for meniscal evaluation was an axial fat-saturated proton density-weighted image with a 4 mm slice thickness. Axial MR images were independently reviewed by two radiologists and were compared with findings of arthroscopy. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy of the axial MR scan for the diagnosis of the meniscal tear were calculated. RESULTS: A total 90 menisci of 45 patients were evaluated in the axial MR scans. Forty-two patients had meniscal tears, and two of the patients had tears in both menisci; thus, a total of44 meniscal tears were found by arthroscopy. For meniscal tears, the sensitivity of the axial plane was 76.2%, the specificity was 89.1% and the accuracy was 81.1%. False negative meniscal tears were seen in 12 cases and false positive meniscal tears were seen in 5 cases on the axial MR images. CONCLUSION: In standard knee MRI examinations, axial images may be valuable for the detection and localization of meniscal tears.
Arthroscopy ; Diagnosis* ; Humans ; Knee Injuries ; Knee Joint* ; Knee* ; Magnetic Resonance Imaging ; Medial Collateral Ligament, Knee ; Menisci, Tibial ; Protons ; Sensitivity and Specificity

Athletic Injuries ; diagnosis ; therapy ; Humans ; Knee Injuries ; diagnosis ; therapy ; Magnetic Resonance Imaging ; Tomography, X-Ray Computed

Athletic Injuries ; diagnosis ; Biomechanical Phenomena ; Humans ; Knee Injuries ; diagnosis ; physiopathology ; Magnetic Resonance Imaging

PURPOSE: To evaluate the diagnostic accuracy of MR imaging in posterior cruciate ligament(PCL) injuries, to describe the variety of these injuries and to assess the type and frequency of associated knee injuries. MATERIALS AND METHODS: We retrospetively analysed 75 cases with knee injuries. In all cases, the prescence of a PCL tear was determined by arthroscopy or surgery and the type of tear and patterns of associated knee injuries were described. RESULTS: Twenty-eight PCL tears were identified with arthroscopy or surgery. Figures for the sensitivity, specificity, and accuracy of MR diagnosis for the PCL injury were 86%, 94% and 91% respectively. Twenty-one cases(75%) had complete PCL tears and seven (25%) had partial tears. The commonest tear site was midsubstance(18 cases, 64.3%). Twenty-seven cases(96%) had associated knee injuries ; the remaining patient(4%) had isolated PCL injuries. There were 19 cases(68%) of ligamentous injuries, ten (36%) of meniscal tear, ten (36%)of bony injuries, and 20 (71%) of joint effusions. Of the ligamentous injuries, those involving the medialcollateral ligament were most often seen(10 cases, 36%). CONCLUSIONS: MR imaging is an accurate method for the detection and evaluation of PCL injury and associated knee abnormalities.
Arthroscopy ; Diagnosis ; Joints ; Knee ; Knee Injuries ; Ligaments ; Magnetic Resonance Imaging* ; Posterior Cruciate Ligament* ; Sensitivity and Specificity

PURPOSE: The purpose of this study is to present the usefulness of arthrometer (KT-2000) in patients with anterior knee instability and to assist in evaluating an objective prognosis after anterior cruciate ligament reconstruction. MATERIAL AND METHOD: We analyzed the manual maximum anterior displacement, passive anterior displacement at 30Ib force and compliance index between 15Ib and 30Ib, measured by KT-2000 in 82 cases of patient who had unilateral anterior knee instability and 40 cases of volunteers, as control group, who had no history of knee injury. We used the Paired and Independent t-test for statistical analysis. RESULTS: In control group, the mean value of manual maximum anterior displacement is 0.8 +/- 0.9mm, passive anterior displacement, 1.4 +/- 1.3mm and compliance index, 1.1 +/- 1.1mm. In patient group, the mean value of manual maximum anterior displacement is 7.1 +/- 2.7mm, passive displacement, 6.1 +/- 2.6mm and compliance index, 3.8 +/- 1.8mm. We found that the patient group was revealed much higher degree of anterior displacement than the control group (p<0.005) . CONCLUSION: KT-2000 is objective and quantitative in diagnosis of anterior knee instability.
Anterior Cruciate Ligament Reconstruction ; Compliance ; Diagnosis ; Humans ; Knee Injuries ; Knee* ; Prognosis ; Volunteers