scholarly journals A Case of Bilateral Permanent Subluxation of the Lateral Meniscus

2016 ◽  
Vol 2016 ◽  
pp. 1-4
Author(s):  
Jun Suganuma ◽  
Tadashi Sugiki ◽  
Yutaka Inoue
Keyword(s):  
Magnetic Resonance ◽  
Knee Joint ◽  
Lateral Meniscus ◽  
Detailed Examination ◽  
Magnetic Resonance Images ◽  
Posterior Segment ◽  
Anterior Dislocation ◽  
Normal Position ◽  
Straight Position ◽  
History Of

We report a case of bilateral, permanent subluxation of the lateral meniscus. To our knowledge, the present case is the first reported description of bilateral irreducible anterior dislocation of the posterior segment of the lateral meniscus. This disorder is characterized by a flipped meniscus sign of the lateral meniscus on sagittal magnetic resonance images of the knee joint, with no history of trauma or locking symptoms. A detailed examination of serial magnetic resonance images of the lateral meniscus can help differentiate this condition from malformation of the lateral meniscus, that is, a double-layered meniscus. We recommend two-stage treatment for this disorder. First, the knee joint is kept in straight position for 3 weeks after the lateral meniscus is reduced to the normal position. Second, if subluxation of the lateral meniscus recurs, meniscocapsular suture is then performed. Although subluxation of the lateral meniscus without locking symptoms is rare, it is important to be familiar with this condition to diagnose and treat it correctly.

Visualization of Cartilage from Knee Joint Magnetic Resonance Images and Quantitative Assessment to Study the Effect of Age, Gender and Body Mass Index (BMI) in Progressive Osteoarthritis (OA)

2019 ◽  
Vol 15 (6) ◽  
pp. 565-572
Author(s):  
Mallikarjunaswamy Shivagangadharaiah Matada ◽  
Mallikarjun Sayabanna Holi ◽  
Rajesh Raman ◽  
Sujana Theja Jayaramu Suvarna
Keyword(s):  
Body Mass Index ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Body Mass ◽  
3D Visualization ◽  
Cartilage Degradation ◽  
Magnetic Resonance Images ◽  
Cartilage Thickness ◽  
Knee Joints ◽  
Data Set

Background: Osteoarthritis (OA) is a degenerative disease of joint cartilage affecting the elderly people around the world. Visualization and quantification of cartilage is very much essential for the assessment of OA and rehabilitation of the affected people. Magnetic Resonance Imaging (MRI) is the most widely used imaging modality in the treatment of knee joint diseases. But there are many challenges in proper visualization and quantification of articular cartilage using MRI. Volume rendering and 3D visualization can provide an overview of anatomy and disease condition of knee joint. In this work, cartilage is segmented from knee joint MRI, visualized in 3D using Volume of Interest (VOI) approach. Methods: Visualization of cartilage helps in the assessment of cartilage degradation in diseased knee joints. Cartilage thickness and volume were quantified using image processing techniques in OA affected knee joints. Statistical analysis is carried out on processed data set consisting of 110 of knee joints which include male (56) and female (54) of normal (22) and different stages of OA (88). The differences in thickness and volume of cartilage were observed in cartilage in groups based on age, gender and BMI in normal and progressive OA knee joints. Results: The results show that size and volume of cartilage are found to be significantly low in OA as compared to normal knee joints. The cartilage thickness and volume is significantly low for people with age 50 years and above and Body Mass Index (BMI) equal and greater than 25. Cartilage volume correlates with the progression of the disease and can be used for the evaluation of the response to therapies. Conclusion: The developed methods can be used as helping tool in the assessment of cartilage degradation in OA affected knee joint patients and treatment planning.

Clinical Diagnostic Value of Magnetic Resonance Imaging in Knee Joint Sports Injury

2021 ◽  
Vol 11 (2) ◽  
pp. 453-461
Author(s):  
Bing Wang ◽  
Li Wang ◽  
Yingyi Wang ◽  
Fen Qin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Clinical Judgment ◽  
Lateral Meniscus ◽  
Clinical Effects ◽  
Resonance Imaging ◽  
Knee Meniscus ◽  
Meniscus Injury ◽  
Sensitivity Specificity

This article mainly analyzes the clinical effects of magnetic resonance diagnosis in knee meniscus injury. Patients with knee meniscus injury were taken as the research object. All patients used magnetic resonance examination and surgery and arthroscopy examination, and surgery and arthroscopy examination as the control parameters. The analysis used magnetic resonance diagnosis results and the classification of meniscus injury diagnosed by magnetic resonance and surgery and arthroscopy. The results showed that the sensitivity, specificity, and accuracy of conventional MR1 sequence diagnosis of medial meniscus injury were 86.3%, 95.6%, and 92.4%, respectively. The sensitivity, specificity and accuracy of conventional MRI in diagnosing lateral meniscus injury of the knee joint were 91.3%, 94.5%, and 92.5% respectively. The sensitivity of MRI to medial and lateral meniscus injury was (χ2 = 0.07, P > 0.77), There were no significant differences in specificity χ2 = 0.01, P > 0.77) and accuracy χ2 = 0.01, P > 0.77). The knee meniscus injury has a greater impact on patients. The diagnostic effect of magnetic resonance imaging is better and the diagnostic accuracy is higher. It can help clinical judgment and treatment. The effect is obvious and worthy of clinical promotion.

MR imaging of meniscal subluxation in the knee

1997 ◽  
Vol 38 (5) ◽  
pp. 876-879 ◽  
Author(s):  
M. J. Breitenseher ◽  
S. Trattni ◽  
I. Dobrocky ◽  
C. Kukla ◽  
S. Nehrer ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Knee Joint ◽  
Tibial Plateau ◽  
Medial Meniscus ◽  
Lateral Meniscus ◽  
Joint Effusion ◽  
Normal Position ◽  
Rare Finding ◽  
Asymptomatic Volunteers ◽  
The Mean

Purpose: The aim of this study was to establish diagnostic criteria for meniscal subluxation, and to determine whether there was any connection between meniscal subluxation and other common meniscal and knee-joint abnormalities. Material and Methods: The normal position of the meniscal body was assessed in 10 asymptomatic volunteers. MR signs of meniscal subluxation were evaluated retrospectively in 60 symptomatic patients with pain in the knee, impaired mobility, and/or joint swelling who had no clear diagnosis after the evaluation of case history, clinical examination, and radiography. The criterion for subluxation of the meniscus was defined as a distance of ≥3 mm between the peripheral border of the meniscus and the edge of the tibial plateau. Results: In the volunteers, the mean distance from the medial meniscus to the edge of the tibial plateau was 0.07 mm, and that from the lateral meniscus was 0 mm. In 55 symptomatic patients without meniscal subluxation, the mean distance from.the meniscus to the edge of the tibial plateau was 0.27 mm. Five patients (8%) had evidence of meniscal subluxation, 4 in the medial meniscus and one in the lateral meniscus. The most commonly associated knee abnormality was joint effusion in 5 knees and osteoarthritis in 2 knees. Conclusion: Meniscal subluxation was not a rare finding with MR imaging in patients with painful knees. Meniscal subluxation was associated with other knee abnormalities such as joint effusion or osteoarthritis.

scholarly journals Knee Cartilage Thickness Differs Alongside Ages: A 3-T Magnetic Resonance Research Upon 2,481 Subjects via Deep Learning

2021 ◽  
Vol 7 ◽  
Author(s):  
Liping Si ◽  
Kai Xuan ◽  
Jingyu Zhong ◽  
Jiayu Huo ◽  
Yue Xing ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Deep Learning ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Magnetic Resonance Images ◽  
Cartilage Thickness ◽  
Imaging Data ◽  
Knee Cartilage ◽  
Large Collection ◽  
The Relationship

Background: It was difficult to distinguish the cartilage thinning of an entire knee joint and to track the evolution of cartilage morphology alongside ages in the general population, which was of great significance for studying osteoarthritis until big imaging data and artificial intelligence are fused. The purposes of our study are (1) to explore the cartilage thickness in anatomical regions of the knee joint among a large collection of healthy knees, and (2) to investigate the relationship between the thinning pattern of the cartilages and the increasing ages.Methods: In this retrospective study, 2,481 healthy knees (subjects ranging from 15 to 64 years old, mean age: 35 ± 10 years) were recruited. With magnetic resonance images of knees acquired on a 3-T superconducting scanner, we automatically and precisely segmented the cartilage via deep learning and calculated the cartilage thickness in 14 anatomical regions. The thickness readings were compared using ANOVA by considering the factors of age, sex, and side. We further tracked the relationship between the thinning pattern of the cartilage thickness and the increasing ages by regression analysis.Results: The cartilage thickness was always thicker in the femur than corresponding regions in the tibia (p < 0.05). Regression analysis suggested cartilage thinning alongside ages in all regions (p < 0.05) except for medial and lateral anterior tibia in both females and males (p > 0.05). The thinning speed of men was faster than women in medial anterior and lateral anterior femur, yet slower in the medial patella (p < 0.05).Conclusion: We established the calculation method of cartilage thickness using big data and deep learning. We demonstrated that cartilage thickness differed across individual regions in the knee joint. Cartilage thinning alongside ages was identified, and the thinning pattern was consistent in the tibia while inconsistent in patellar and femoral between sexes. These findings provide a potential reference to detect cartilage anomaly.

scholarly journals Measurement of Posterior Tibial Slope in Turkish Population Groups with Magnetic Resonance İmaging

2020 ◽  
Author(s):  
Musab Ümeyir Karakanlı ◽  
Ferdanur Deniz ◽  
İlkin Celilov ◽  
Ömer Sofulu ◽  
Fatih Küçükdurmaz
Keyword(s):  
Magnetic Resonance ◽  
Tibial Slope ◽  
Turkish Population ◽  
Magnetic Resonance Images ◽  
Posterior Tibial Slope ◽  
Slice Thickness ◽  
Posterior Tibial ◽  
Significant Difference ◽  
History Of ◽  
The Mean

Abstract Background The posterior tibial slope (PTS) has great importance on the balance and the stability of the knee and has to be taken into account during the reconstruction and replacement procedure. However, the anthropometric measurements are not universal and show population-based variations. The purpose of this study is to find features of PTS in the Turkish population in regards to the medial and lateral compartment. Methods Magnetic resonance images (MRIs) were retrieved from the Picture Archiving and Communication System (PACS). Subjects from 25 to 45 years old were included from the MRIs taken between July 2015 to July 2017. Any MRI with radiological signs of osteoarthritis, chondral and meniscus (grade 3 & 4) lesions was excluded as well as a deformity in the lower extremity, patients with a history of fracture and/or history of knee surgery. The measurements were made using T1-weighted coronal and sagittal MRI planes with a slice thickness of 4 mm. The PTS of the medial, lateral plateau were recorded with gender and age of the subjects. Non-parametric Spearman's Correlation tests and Student T tests were used to calculate the relationship between medial-lateral PTS and ages and also to evaluate PTS differences between genders. Results Two-hundred thirty-two subjects (122 female, 110 male) were included in the study. The mean medial and lateral PTS were 7.7°±1.3° and 7.5°±1.3° respectively, and there was a significant correlation (p < 0.001). However, no significant difference was found in the mean medial PTS (p = 0.45) and lateral PTS (p = 0.73) between genders and matched age groups. Conclusions Our results showed that there is no gender-based variation in the Turkish population. Although we do not make a systematic comparison, the measurements of PTS in the Turkish population were different from other populations.

Pitfalls in interpreting rat knee joint magnetic resonance images and their histological correlation

2009 ◽  
Vol 50 (9) ◽  
pp. 1042-1048 ◽  
Author(s):  
Hao-Hao Wang ◽  
Yi-Xiang J. Wang ◽  
J. F. Griffith ◽  
Yan-Lin Sun ◽  
Ge Zhang ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Knee Joint ◽  
Magnetic Resonance Images

scholarly journals Congenital spinal dermal tract: how accurate is clinical and radiological evaluation?

2015 ◽  
Vol 15 (6) ◽  
pp. 651-656 ◽  
Author(s):  
Martin M. Tisdall ◽  
Richard D. Hayward ◽  
Dominic N. P. Thompson
Keyword(s):  
Magnetic Resonance ◽  
Spinal Dysraphism ◽  
Sinus Tract ◽  
Magnetic Resonance Images ◽  
Dermal Sinus ◽  
Inclusion Cyst ◽  
Operative Finding ◽  
Increased Risk ◽  
History Of ◽  
Operative Findings

OBJECT A dermal sinus tract is a common form of occult spinal dysraphism. The presumed etiology relates to a focal failure of disjunction resulting in a persistent adhesion between the neural and cutaneous ectoderm. Clinical and radiological features can appear innocuous, leading to delayed diagnosis and failure to appreciate the implications or extent of the abnormality. If it is left untreated, complications can include meningitis, spinal abscess, and inclusion cyst formation. The authors present their experience in 74 pediatric cases of spinal dermal tract in an attempt to identify which clinical and radiological factors are associated with an infective presentation and to assess the reliability of MRI in evaluating this entity. METHODS Consecutive cases of spinal dermal tract treated with resection between 1998 and 2010 were identified from the departmental surgical database. Demographics, clinical history, and radiological and operative findings were collected from the patient records. The presence or absence of active infection (abscess, meningitis) at the time of neurosurgical presentation and any history of local sinus discharge or infection was assessed. Magnetic resonance images were reviewed to evaluate the extent of the sinus tract and determine the presence of an inclusion cyst. Radiological and operative findings were compared. RESULTS The surgical course was uncomplicated in 90% of 74 cases eligible for analysis. Magnetic resonance imaging underreported the presence of both an intradural tract (MRI 46%, operative finding 86%) and an intraspinal inclusion cyst (MRI 15%, operative finding 24%). A history of sinus discharge (OR 12.8, p = 0.0003) and the intraoperative identification of intraspinal inclusion cysts (OR 5.6, p = 0.023) were associated with an infective presentation. There was no significant association between the presence of an intradural tract discovered at surgery and an infective presentation. CONCLUSIONS Surgery for the treatment of spinal dermal tract carries a low morbidity. While it seems intuitive that tracts without intradural extension carry a low risk of spinal cord tethering, it is not possible to reliably detect these cases using MRI. Similarly, intraspinal dermoid cannot be reliably excluded using MRI and carries an increased risk of infection. These points justify excision together with intradural exploration of all spinal dermal sinus tracts.

Intractable hiccups as a presenting symptom of cerebellar hemangioblastoma

2004 ◽  
Vol 100 (6) ◽  
pp. 1107-1110 ◽  
Author(s):  
Tetsuya Nagayama ◽  
Masatomo Kaji ◽  
Hirofumi Hirano ◽  
Masaki Niiro ◽  
Jun-ichi Kuratsu
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Resonance Images ◽  
Review Of The Literature ◽  
Total Removal ◽  
Content Type ◽  
Cerebellar Hemangioblastoma ◽  
History Of ◽  
Neurologically Intact ◽  
Intractable Hiccups ◽  
Fine Print

✓ The authors report on a 52-year-old woman with a cerebellar hemangioblastoma who presented with a 2-year history of intractable hiccups. Computerized tomography scans and magnetic resonance images revealed a cerebellar hemangioblastoma with compression of the brainstem at the level of the medulla oblongata. The patient has been free of hiccups and has been neurologically intact since the day after total removal of the tumor. A review of the literature on medullary lesions presenting with intractable hiccups is provided.

Pitfalls in Interpreting Rat Knee Joint Magnetic Resonance Images and Their Histological Correlation

2009 ◽  
pp. 1-7 ◽  
Author(s):  
Hao-Hao Wang ◽  
Yi-Xiang Wang ◽  
J. F. Griffith ◽  
Yan-Lin Sun ◽  
Ge Zhang ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Knee Joint ◽  
Magnetic Resonance Images
Sign in / Sign up

Export Citation Format

Share Document