Midbody Of Lateral Meniscus Research Articles

All-Inside Suture Repair for Isolated Radial Tears at the Midbody of the Lateral Meniscus

In young athletes, radial tear of the midbody on the semilunar lateral meniscus in stable knees is most common. Conventionally, for this type of tear, meniscectomy has been considered as a first-line treatment. However, meniscectomy does not prevent degenerative change. Therefore, repair is another treatment option for a full radial tear, though this type of tear can be difficult to repair because of the lack of a vascular supply. Compared with conventional transcapsular suture techniques (e.g., inside-out/outside-in techniques or all-inside techniques with implants), all-inside suture (AIS) repair techniques can avoid bunching of the meniscus to the capsule. AIS is considered suitable for restoration of normal structure and movement of the meniscus after repair, which can be advantageous for meniscal healing. However, AIS repair for an isolated radial tear at the midbody of the lateral meniscus has rarely been reported. Therefore, we applied the AIS repair technique for isolated radial tear at the midbody of the semilunar lateral meniscus using a QuickPass SutureLasso with 2-0 FiberWire. This procedure is easier and less invasive, shortening the gap by drawing each stump of the meniscus in the direction of the circumference.

English

AIMS: The purpose of this study is to determine dimensions of menisci on MRI. The standard dimensions of lateral and medial menisci shall help us to differentiate between normal and abnormal menisci, and this may be important for planning surgical interventions in knee joint. METHODS AND MATERIALS: 100 Indian patients with history of knee pain were subjected to MRI. None of the patients had any pathological signal intensity suggesting meniscal tear. Patients were scanned in supine position with knees extended. All patients were studied in sagittal and coronal planes. The Anterior horn, Posterior horn and Mid-body of menisci were examined in sagittal and coronal plane for the following parameters: Height and width of Anterior and Posterior horn of lateral and medial meniscus on sagittal plane. Height and width of mid-body of lateral and medial menisci on coronal plane. Height and width of anterior and posterior horn were measured on sagittal plane where the highest and widest meniscal size was observed. The mid-body was measured at the level of intercondylar eminence, in the coronal plane. STATISTICAL ANALYSIS: Comparison of variables was done with paired sample t-test. Two-tailed p-values <0.05 were considered as significant. The SPSS 10.0 program was used for the purpose of statistical analyses. Data, presented as mean +- SD. RESULT: Following results were seen: Height of anterior and posterior horn of medial meniscus was greater than lateral. Width of anterior horn and mid-body of lateral meniscus was greater than medial. Posterior horn of medial meniscus is the widest part and greater than lateral. In the anterior and posterior thirds, the medial meniscus was significantly more thick (p <0.05) than the lateral. Posterior third part of medial meniscus was the widest. (p <0.05). Results of this study showed an important relation between morphometric data of menisci and clinical data, i.e. it was seen that, more meniscal tears were seen where height and width of meniscus was less. This study

MRI features of the radial meniscal tears

Objective To access the ability of MRI for detecting the radial meniscal tears.Methods Arthroscopy of the knee was performed by a single orthopedic surgeon on 1085 patients. On the basis of the results of arthroscopy, 107(9.9%) knees had radial tears of menisci. Through interval sampling of the patients with meniscal tears but not radial tears, 100 patients were selected as a controlled group. All MR images were analyzed by two radiologists independently. Four radiological signs were used to detect radial tears: cleft and marching cleft sign, detached sign, ghost sign, and small meniscal sign. All the features of MRI were compared with the results of the arthroscopy. Results (1) The most frequent location of radial tears was the midbody of lateral meniscus (71/107, 66. 4%)followed by the boundary of anterior horn and midbody of the lateral meniscus (25/107, 23.4%). (2) One hundred and two of 107 patients were identified as radial tears on MRI. However, 11 of 100 patients with non-radial tears were misdiagnosed as radial tears by MRI. The sensitivity, specificity, positive predictive value, and negative predictive value of MRI were 95.3% (102/107),89.0% (89/100),90.3% (102/113), and 94.7% (89/94),respectively. (3) The cleft sign (59/102, 57.8%) and detached sign (43/102, 42.2%) were the most frequent and important MRI signs. Conclusion The accuracy of MRI to identify the radial meniseal tears'is very high and MRI is the best imaging modality for patients suspected of radial meniscal tears. Key words: Menisci, Tibia; Lacerations; Magnetic resonance imaging; Arthroscopy