Influence of the Discoid Lateral Meniscus on the Knee Joint.

The aim of the present study is to build a software implementation of a previous study and to diagnose discoid lateral menisci on knee joint radiograph images. A total of 160 images from normal individuals and patients who were diagnosed with discoid lateral menisci were included. Our software implementation includes two parts: preprocessing and measurement. In the first phase, the whole radiograph image was analyzed to obtain basic information about the patient. Machine learning was used to segment the knee joint from the original radiograph image. Image enhancement and denoising tools were used to strengthen the image and remove noise. In the second phase, edge detection was used to quantify important features in the image. A specific algorithm was designed to build a model of the knee joint and measure the parameters. Of the test images, 99.65% were segmented correctly. Furthermore, 97.5% of the tested images were segmented correctly and their parameters were measured successfully. There was no significant difference between manual and automatic measurements in the discoid ( P = 0.28 ) and control groups ( P = 0.15 ). The mean and standard deviations of the ratio of lateral joint space distance to the height of the lateral tibial spine were compared with the results of manual measurement. The software performed well on raw radiographs, showing a satisfying success rate and robustness. Thus, it is possible to diagnose discoid lateral menisci on radiographs with the help of radiograph-image-analyzing software (BM3D, etc.) and artificial intelligence-related tools (YOLOv3). The results of this study can help build a joint database that contains data from patients and thus can play a role in the diagnosis of discoid lateral menisci and other knee joint diseases in the future.

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Multivariate ordered logistic regression analysis of the postoperative effect of symptomatic discoid lateral meniscus

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-021-03821-3 ◽

2021 ◽

Author(s):

Shun-Jie Yang ◽

Jian Li ◽

Yang Xue ◽

Zhong Zhang ◽

Gang Chen

Keyword(s):

Logistic Regression ◽

Age Of Onset ◽

Univariate Analysis ◽

Arthroscopic Surgery ◽

Lateral Meniscus ◽

Postoperative Outcomes ◽

Discoid Lateral Meniscus ◽

Work Intensity ◽

Duration Of Symptoms ◽

Ordered Logistic Regression

Abstract Introduction The postoperative effect of arthroscopy in the treatment of symptomatic discoid lateral meniscus (DLM) varies greatly among individuals. Therefore, this study aims to investigate the factors affecting the postoperative outcomes of symptomatic DLM. Materials and methods According to the inclusion and exclusion criteria, patients with symptomatic single-knee DLM who underwent arthroscopic surgery at our hospital from 9/2008 to 9/2015 were included. Retrospectively collected 16 factors probably affecting postoperative outcomes. The Ikeuchi grade system was used to evaluate the knee joint function. Univariate analysis was performed by Kruskal–Wallis rank-sum test or Mann–Whitney U test, and multivariate analysis by ordered logistic regression. P < 0.05 was considered statistically significant. Results A sum of 502 patients was included, including 353 females (70.3%) and 149 males (29.7%). Difference between preoperative and postoperative Ikeuchi grade was statistically significant (P < 0.001). Female was bad to obtain a good Ikeuchi grade (P = 0.009, OR 0.458). Outerbridge grade (P = 0.018, OR 0.638) was negatively correlated with Ikeuchi grade. BMI (P = 0.001, OR 0.875) and work intensity (P = 0.020, OR 0.611) were inversely correlated with Ikeuchi grade. Age of onset (P < 0.001, OR 0.956) and symptoms duration (P < 0.001, OR 0.988) were negatively correlated with Ikeuchi grade. Besides, compared to total meniscectomy, meniscoplasty with a repair was an unfavourable factor for Ikeuchi grade (P = 0.044, OR 0.245). Conclusions With the increase of BMI, work intensity, age of onset, duration of symptoms, and the severity of cartilage lesion, the postoperative results become worse. Moreover, female and meniscoplasty with repair are risk factors for the postoperative outcomes.

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Open-wedge high tibial osteotomy in patients with discoid lateral meniscus

Journal of Orthopaedic Surgery ◽

10.1177/23094990211017355 ◽

2021 ◽

Vol 29 (2) ◽

pp. 230949902110173

Author(s):

Hee-June Kim ◽

Ji-Yeon Shin ◽

Hyun-Joo Lee ◽

Chul-Hee Jung ◽

Kyeong-Hyeon Park ◽

...

Keyword(s):

High Tibial Osteotomy ◽

Lateral Meniscus ◽

Lateral Compartment ◽

Clinical Results ◽

Discoid Lateral Meniscus ◽

Tibial Osteotomy ◽

Open Wedge ◽

Factors Affecting ◽

The Mean ◽

Open Wedge Hto

Background: There are concerns about the progression of the lateral osteoarthritis (OA) should be taken into account when high tibial osteotomy (HTO) is performed in patients with discoid lateral meniscus (LM). This study evaluated the clinical results of HTO in patients with discoid LM and elucidated factors affecting the results. Methods: This study evaluated 32 female patients with varus deformity and medial OA. Patients with discoid LM (8 patients) or without discoid LM (24 patients) underwent open-wedge HTO. The mean age was 53.5 years and the mean follow-up period was 35 months. Clinical results, including the Hospital for Special Surgery (HSS) score, Knee Society knee score (KS) and function score (FS), were evaluated. The progression of OA in the lateral compartment was also evaluated. Finally, we evaluated the factors affecting the clinical results and OA progression in the lateral compartment. Results: Between two groups, all clinical scores were not different (p = 0.964, 0.963, and 0.559, respectively). Three of eight patients (37.5%) in the discoid group developed OA in the lateral compartment, whereas 2 of 24 patients (8.3%) in the control group developed such; however, this was not significantly different (p = 0.085). In discoid group, patients with undercorrection has higher KS relative to patients with acceptable correction (p = 0.044). Other clinical results and OA change in the lateral compartment were not affected by evaluated factors. Conclusions: Patients who underwent open-wedge HTO showed the satisfactory clinical results and lateral OA progression regardless of the presence or absence discoid LM. However, when discoid LM was present, patients with undercorrection showed higher KS in comparison with patients with acceptable correction.

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Meniscus Repair With Anterior Cord Release for Peripheral Tear Type of Discoid Lateral Meniscus

Arthroscopy Techniques ◽

10.1016/j.eats.2020.10.016 ◽

2021 ◽

Vol 10 (2) ◽

pp. e353-e357

Author(s):

Tomoyuki Suzuki ◽

Takashi Matsumura ◽

Hidenori Otsubo ◽

Miki Kuroda

Keyword(s):

Lateral Meniscus ◽

Meniscus Repair ◽

Discoid Lateral Meniscus

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