PB Nitom Blog Discoid meniscus가 . A discoid meniscus is an abnormal congenital morphological anom-aly:itisthicker,haslessvascularity,hasa'disc'shapeinsteadofanormal 'semilunar' shape and covers more tibial plateau. In most cases, the patients may not experience any symptoms throughout his life. A meniscus tear can be diagnosed during a physical exam from a sports medicine expert who may check your knee's range of motion as well as your walking gait. Bilateral discoid medial menisci (BDMM) represent an exceptionally rare congenital pathology of the knee joint that has low reported incidence. A discoid meniscus generally covers the entire tibial plateau. Several theories have been proposed regarding the possible cause of DM. The goal of surgery is to contour the discoid lateral meniscus to resemble a normal meniscus. The reported incidence of discoid meniscus ranges from 0.4 to 17% for the lateral meniscus [11, 12]. Discoid meniscus (DM) is a rare variant of regular knee anatomy. Discoid meniscus is an abnormal meniscus that is thicker than normal and has a different shape and texture that usually affects the lateral meniscus of the knee 1) . A discoid meniscus is a dysmorphic meniscus found to be thicker, abnormal in shape, less stable and with decreased and disorganized collagen fibers compared to an anatomically normal meniscus. 1993:591-595, Figure 3. The discoid lateral meniscus is more common in females. A discoid meniscus is semi-circular instead of C-shaped. It sometimes may present itself in the form of swelling, pain and cracking sound of the affected knee. However, in some instances, it may hinder the patient's day to day life and needs immediate treatment. . A discoid meniscus is a congenital anomaly of the knee found in 3% of the population (up to 15% in Asia). The natural history depends on the type of anomaly and the nature and presence of symptoms. A discoid lateral meniscus is the most common abnormality of the lateral meniscus. Fourth, the presence of a discoid meniscus has a poorer prognosis due to the oversized meniscus causing excessive stress at the articular surface during motion (16). Some authors have reported bilateral discoid menisci in identical female twins 20) or in a family of three brothers and sisters 20, 21). 3 in contrast to lateral involvement, the … The discoid meniscus is an uncommon anatomical meniscal variant that may present with pain, snapping, motion loss, swelling, and locking of the affected knee, typically during childhood or adolescence. The meniscus is a half circular disk of cartilage and is located between the tibia and the femur. Many people have them and don't know it. It proves that arthroscopic surgery for discoid meniscus injury has the advantages of less damage and faster recovery, it is the first choice for the treatment of discoid meniscus injury, and the postoperative effect is significant in young patients and those with short duration of symptoms; mixed tears have a greater impact on the . What are the odds that my right knee menisci are also discoid? The management of a meniscal cyst consists of diagnostic arthroscopy to determine the presence of a meniscal tear. Subjects and methods: We have investigated the apoptotic and autophagic gene . A discoid meniscus can be associated with knee abnormalities such as high fibular head, fibular muscular defects, hypoplasia of the . Although the incidence for a discoid meniscus is between 3% and 5% for the general population, it is unknown with achondroplasia. Background: How the meniscus adapts to the morphological changes in the lateral tibiofemoral compartment, in terms of gene expression, was the reason to establish this present study. Discoid menisci are prone to tearing secondary to increased thickness, poor tissue quality, and instability. This case series includes 4 patients, with ages ranging from adolescence to early . However, cases of accessory lateral meniscus in the form of a double-layered meniscus are extremely uncommon (reported with a prevalence of 0.06% to 0.09% [2, 3]) and, when present, are believed to potentially contribute to the symptoms of patients . Meniscus tears usually occur after a sudden forceful twisting of the knee, which causes the meniscus — the semicircular, wedge-shaped collection of soft cartilage in the knee — to stretch and tear. My orthopedic surgeon indicated that discoid menisci are more prone to tears than "normal" menisci . Healthy meniscus is shaped like crescent moons (in fact, "meniscus" comes from the Greek word for crescent). in 1936 [2, 3].As its name implies, the defining feature of the discoid meniscus is its . Arthroscopic treatment of meniscal cysts. Discoid menisci are congenital, frequently bilateral (up to 50%) and have been reported in twins, although no genetic locus has been identified . The discoid meniscus is a thickened, disc-like meniscus and is referred as a normal anatomical variant in 3% of general population mostly seen on the lateral side [1]. Diagnosis can be suspected on radiographs with (squaring of lateral condyle with cupping of lateral tibial plateau) but require MRI for confirmation (3 or more 5mm sagittal images with meniscal continuity). The discoid lateral meniscus is . Discoid Meniscus The meniscus is a wedge-shaped piece of cartilage that sits in between the bones of the knee and acts as a cushion to protect the bones during movement. The discoid meniscus may be a congenital anomaly, and genetics or family history may play a role in the development of discoid menisci. Initially, the abnormal shape of DM was thought to result from a failure of central resorption of its intermediate form during . 1 Although the etiology of discoid meniscus is not completely understood, it is considered a congenital anomaly with a possible genetic component. 2, 3 Incidence is estimated at 0.4% to 5.2% in . Abstract: Discoid meniscus is a congenital variant of the knee joint that typically involves abnormal morphology and potential instability of the lateral meniscus. Discoid meniscus 는. There are three different kinds of discoid meniscus susceptible to tearing. Discoid meniscus is a congenital anatomic variant seen almost exclusively on the lateral (outer) side of the knee. Discoid menisci are usually found on the lateral (outer) side of the knee. The discoid meniscus is an anatomical variant of the normal meniscus where it is broader and saucer-shaped. Once a discoid meniscus is torn, it usually does not heal because the meniscus lacks a strong blood supply. BMJ Case Rep 2013; DOI 10.1136/bcr-2013-202217. Discoid lateral meniscus is a common abnormal meniscal variant in children. 발생하며 후천성 변화로 . The purpose of this systematic review is to evaluate evidences of DM . It should be noted that an asymptomatic . Patella Dislocation and Discoid Meniscus: Actual Study Start Date : March 21, 2019: Estimated Primary Completion Date : December 31, 2022: • Discoid Meniscus Clinical Pearl • Always check Hip ROM during a clinical exam for a pediatric knee patient • Many hip pathologies may present as knee . The discoid meniscus is a relatively rare abnormality of the knee joint. The discoid meniscus may indeed be a congenital anomaly 9, 17), and genetic or familial factors may play a role in the development of discoid menisci 8, 19). PRiSM. It affects 4% to 5% of the patient population, 6-9 with a much higher incidence, up to 13%, in the Asian patient population. Each knee has two menisci. There are variations in incidence in various population groups ranging from 0.4-17% for lateral discoid meniscus and 0.1-3 % for medial discoid meniscus. Due to these anatomic differences, a discoid meniscus confers inferior mechanical properties and increased risk of both meniscal tear and symptoms such as knee pain and "snapping knee syndrome" . Arthroscopy. The female preponderance of DLM (7:5) was observed 2. The disk shape of these menisci makes them more susceptible to tearing. Sometimes repairs (suturing/stitching) of meniscus is necessary to correct the meniscus, and this can only be assessed during surgery. Management of this disorder should be directed toward resolution of the symptoms while preserving meniscal tissue and function. We reviewed the cases of 2,132 patients who underwent knee arthroscopy between 1986 and 2004 and diagnosis of discoid lateral meniscus was established in 39 patients with mean age of 31.7 ± 9.4 years old. A deficiency in the resorption of the centre of the cartilage plate during foetal development and a genetic trait have been proposed as mechanisms responsible for . The discoid meniscus is a congenital anatomic variant that is estimated to affect up to 5% of the general US population [].In 1889, Young et al. This condition is caused by a defect that causes the meniscus to be shaped like an oval instead of a c-shape. A discoid meniscus is an abnormal congenital morphological anomaly: it is thicker, has less vascularity, has a 'disc' shape instead of a normal 'semilunar' shape and covers more tibial plateau. Discoid meniscus (DM) is a broad term used to describe a spectrum of disorders of meniscal shape and stability that can affect both men and women. A discoid meniscus is thicker than normal, and often oval or disc-shaped. Detailed history and physical examination combined with an MRI of the knee predictably diagnose a discoid meniscus. If a patient does tear the meniscus, the orthopedic surgeon can trim out the inner part and reshape it back to the normal C-shape. Discoid meniscus is the most frequent congenital malformation . The Ohio State University - Wexner Medical Center. The cartilage absorbs the stress on the knee and acts as a cushion between the three bones that meet at the knee — the femur (thigh bone . For some patients, arthroscopy is the means to diagnose and treat a torn meniscus. Completely filled in center or small void in center with thicker outer rim Anatomic variation alters normal mechanics and predisposes to tearing. Because the histology of discoid meniscus is different from that of normal meniscus, it is prone to tearing. It may be present in just the one knee or both knees, and it is generally understood that the condition is genetic Symptoms related to a discoid meniscus A discoid meniscus is the abnormal development of the meniscus leading to a hypertrophic and discoid shaped meniscus. Most people complain of catching, popping, and locking of the knee. The histology and ul-trastructure of the discoid meniscus are different from those of a normal meniscus. The concept of a clinical syndrome of a snapping knee that is caused by this type of DLM is widely accepted in the pediatric orthopedic literature. High type pMFLs tended to be thicker and larger than low type pMFLs and higher thickness and volume of the pMFL was significantly related to the degenerative lateral meniscal tear. The histologic findings of our study seem to confirm that discoid lateral meniscus is different from a normal meniscus in terms of distribution and shape of the cells, vascularity, and organization of collagen fibers, irrespectively of the age of the patients. 않았으나 선천성 기형 으로 인해 . Kaynak Nigerian Journal of Clinical Practice. Pathogenetically, the discoid meniscus may result from failure of the central resorption during the embryologic development [2]. Lateral discoid meniscus is far more common than medial discoid meniscus, with the latter being rare. In . The pMFL thickness and volume were not significantly related to traumatic lateral meniscal tear, medial meniscal tear, and discoid meniscus. . Outside-in Repair of a Radial Tear of the Lateral Meniscus Body . embryological development and hereditary transmission.4 Symptomatic discoid menisci can occur equally in children, adolescents, and young adults, and trauma has been listed . Epidemiology Discoid menisci are congenital, frequently bilateral (up to 50%) and have been reported in twins, although no genetic locus has been identified 2. My meniscus was apparently "discoid" instead of C-shaped. There is an inner (medial) and an outer (lateral) meniscus. This retrospective study was aimed to investigate the epidemiologic, clinical and arthroscopic features of discoid meniscus variant in Greek population. A discoid meniscus has abnormal morphology. A number of researchers have reported a relation between meniscal injuries and discoid meniscus (4,8,9). The histology and ultrastructure of discoid . While all patients initially underwent MRI for a suspected knee injury, those with lateral knee pain due to fracture, chondrosis, osseous stress response, or . It may be present in just the one knee or both knees, and it is generally understood that the condition is genetic Hereditary; The presence of OCD in identical twins suggests there may be a genetic predisposition (4). Incidence of the discoid lateral . To demonstrate the importance of mutation or polymorphism of related genes in injury. 발생하는 원인은 무엇일까요? Others believe that discoid appearance of the . This results in a thickened meniscus that covers more of the lateral tibia (shin bone) than a normal meniscus. The presence of lateral discoid meniscus on MRI was defined as a medialized extension of the inner margin of the meniscus beyond the midline apex of the lateral femoral condyle (LFC) . Discoid menisci are those that have a body that is too wide, usually affecting the lateral meniscus. Hereditary transmission of the discoid lateral menisci is shown in some cases . Watanabe classified the discoid . [3]. Healthy menisci are shaped like crescent moons (in fact, "meniscus" comes from the Greek word for crescent). The discoid meniscus is the most common abnormal meniscal variant in children . Individuals with a discoid meniscus can be asymptomatic or symptomatic. My understanding is that even with the partial meniscus removal, I have a fair amount of lateral meniscus remaining. In most cases, the patients may not experience any symptoms throughout his life. The lateral meniscus of a right knee is shown below in green. The Discoid fibrocartilaginous structure differ to normal menisci with disorganized . Some patients may experience the feeling that their knee is giving away. Conclusion: The discoid meniscus etiology should be considered both in morphological and genetic modulation manners: apoptotic and autophagic genes play roles with tibiofemoral morphological differences. Several tears are amenable to arthroscopic repair. 또한 이러한 변화가 형태학적 변형인지 Discoid Meniscus is a rare orthopedic condition that occurs when the meniscus attains a half-moon or oval shape and thickens up. Discoid meniscus is a diagnosis that encompasses a spectrum of meniscal disorders of shape and stability [ 3 ]. 10 It is the most common meniscal variant in children. It is a congenital defect whose correct etiology is still debated and far from being clarified. Discoid lateral meniscus is an intra-articular knee disorder that typically presents in children and adolescents. Crouzon syndrome is an autosomal dominant genetic disorder known as a branchial arch syndrome. Signs and symptoms of meniscus tears in children and teens Symptoms of a meniscus tear can include: Pain in the knee joint Swelling Limping It is a congenital defect whose correct etiology is still debated and far from being clarified. Although both menisci have been . . However, in some instances, it may hinder the patient's day to day life and needs immediate treatment. The goal of surgery is to contour the discoid lateral meniscus to resemble a normal meniscus. . A Discoid Meniscus is a congenital defect of the meniscus (present in the knee). Healthy menisci are shaped like c-shaped moons It typically affects the lateral meniscus and may be found bilaterally (20%). Hereditary transmission of the discoid lateral menisci is shown in some cases [9]. It has been suggested that discoid meniscus is a congenital disease, and genetic or familial factors may account for some of the causes [3-5]. The patients must discoid meniscus is a structural aberration of development, a genetic abnormality could possibly be at fault. PDF | Background: How the meniscus adapts to the morphological changes in the lateral tibiofemoral compartment, in terms of gene expression, was the. At birth the entire meniscus has a blood supply at birth but by 10 years of age the central third has become avascular. Specifically, this syndrome affects the first branchial (or pharyngeal) arch, which is the precursor of the maxilla and mandible.Since the branchial arches are important developmental features in a growing embryo, disturbances in their development create lasting and widespread effects. A unique type of meniscus problem occasionally encountered in children is an abnormally shaped meniscus called a discoid meniscus. Epidemiology Discoid menisci are congenital, frequently bilateral (up to 50%) and have been reported in twins, although no genetic. Discoid Meniscus. There is a higher prevalence in Asians without any gender predilection . No theories of genetic etiology for discoid meniscus have been brought forward to date. A discoid meniscus is an unusual meniscus variant, and is wider than the normal crescentic shape. When a well-meaning surgeon enters . Sometimes repairs (suturing/stitching) of meniscus is necessary to correct the meniscus, and this can only be assessed during surgery. There is also a genetic or familial factor that is believed to play a role in the development of discoid menisci. Some discoid menisci have abnormal peripheral attachments and are unstable. Discoid menisci are usually found on the lateral (outer) side of the knee. The most common developmental anomaly is discoid meniscus (4,7). In the discoid meniscus, both the shape and the collagen are abnormal. E. K. Schallert 06:05. Meniscus Anatomy The meniscus is a soft and fibrous cartilage resting between the femur and the tibia in the knee. Compared to standard meniscus it is thicker and abnormal in shape; these characteristics make it more prone to tear. current literature supports a congenital theory because of evidence of embryological development and hereditary transmission. There is a higher prevalence of discoid meniscus in Asian countries than in Western countries: 13% in Japan, 10.6% in Korea, 5.8% in India, and 3 to 5% in the United States [ 3, 4 ]. The goal of surgery is to contour the discoid lateral meniscus to resemble a normal meniscus. A discoid meniscus causes pain, stiffness, and swelling of the knee. Objective: This study aimed to determine the changes in the mRNA levels of the apoptotic and autophagic genes in the discoid meniscus. Atik et al Discoid meniscus genetic etiology 648 Nigerian Journal of Clinical Practice ¦Volume 24 Issue 5 May 2021 in conditions leading to cellular stress, such as lack of nutrients and growth factors, to remove damaged organelles, long-lived proteins, and protein aggregates. It is thicker and covers more of the tibial plateau.The incidence of lateral discoid meniscus is 0.4% to 17%5, compared to 0.06% to 0.3%for the . We report members of a Caucasian family with abnormally Answer: Discoid meniscus is a rare condition that affects the lateral meniscus present in the knee. Fewer patients with discoid meniscus in our study may explain that the attachment type and size of the pMFL were not related to discoid meniscus. discoid meniscus, several additional radiographic abnormali-ties may also detected: meniscal cyst formation, anomalous They are incidentally found in 3-5% of knee MRI examinations. There is a higher prevalence of discoid meniscus in Asian countries than in Western countries: 13% in Japan, 10.6% in Korea, 5.8% in India, and 3 to 5% in the United States [3, 4]. 1-5 A discoid meniscus represents a meniscus with an atypical saucer-like shape that is thicker, covering a larger surface area of the tibial plateau compared with an anatomically normal crescent-shaped meniscus. The History and Physical Exam for Discoid Meniscus: Differential Dia… Feat. Discoid meniscus represents the most common congenital abnormality of the knee meniscus. They are incidentally found in 3-5% of knee MRI examinations. 11 Discoid lateral meniscus was originally believed to result from an incomplete breakdown of the central meniscus, but this is now disputed, as at no time in . 24/7 Appointment Helpline +91 40 4567 4567 International +91 40 6600 0066 Home About Us Leadership Team Awards & Recognition Achievements Gallery News Discoid meniscus 발생기전. The meniscus has a shocking absorbing function and it also contributes to the stability of the knee (secondary stabiliser, where the ligaments are the primary stabilizer). Discoid meniscus lacks C-shaped configuration. Discoid meniscus tears o en present in adolescents. In the discoid meniscus, there are decreased collagen 4 symptomatic discoid menisci can occur equally in children, adolescents, and young adults, and trauma has been listed as the inciting cause of symptoms in 38 to 66% of patients. Basics Description Menisci are fibrocartilaginous structures that are C-shaped (axial plane) and wedge-shaped (coronal plane). Overview D iscoid Meniscus is a term that describes an anatomic abnormality of the shape of the meniscus that results in a larger, thicker meniscus that resembles a "disc" rather than the normal "crescent" shape. Discoid meniscus (DM) is a rare variant of regular knee anatomy. (2,7,21). . More variants of the lateral than the medial meniscus have been reported. | Find, read and cite all the research you . The precise aetiology of a discoid meniscus is unknown, although some authors suggested that it is congenital, with a genetic or familiar . In this video, I discuss their significance and how likely they are to be bilateral. Atik et al Discoid meniscus genetic etiology 648 Nigerian Journal of Clinical Practice ¦Volume 24 Issue 5 May 2021 in conditions leading to cellular stress, such as lack of nutrients and growth factors, to remove damaged organelles, long-lived proteins, and protein aggregates.
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