The discoid meniscus is an anatomical variant of the normal meniscus where it is broader and saucer-shaped. 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.
MRI Appearance of Wrisberg Variant of Discoid. Lateral Meniscus Achados sugestivos fortes na ressonância magnética incluem um corpo meniscal engrossado visto em mais de duas fatias contíguas. + 12 principais perguntas In this article is analysed MRI of knee joints of 409 patients and results of 15 knee joint arthroscopic revisions of patients with a discoid lateral meniscus. 9 May 2019 Radiograph of the knee showed widened lateral joint space and medial joint space narrowing. MRI showed increased thickness and flattening of Each discoid meniscus was classified according to the Watanabe classification on the basis of its appearance on magnetic resonance imaging or at the time of. Ohlert et al.
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This Web Clinic will discuss the anatomical features that stabilize the lateral meniscus, in particular the popliteomeniscal fascicles, and will review presentations of lateral meniscal instability seen with MRI. Case. Discoid lateral meniscus. Diagnosis certain. Dr Ammar Haouimi. Published 16 Feb 2020. 92% complete. MRI. Discoid meniscus with tear.
Discoid meniscus (DM) is currently considered as a spectrum of disorders in meniscal shape and stability. Diagnosing DM on MR imaging has clinical and surgical implications. When diagnosing a DM on MR imaging, identification of tears and signs of instability is of utmost importance.
Ari Youderian, MD, Margaret A. Stull, MD.Discoid lateral meniscus.Applied Radiology. 2008:30-32. Paul M Aichroth, Dipak V Patel et al. Congenital discoid lateral meniscus in children. The J Bone Joint Sur 1997;73(B)6:932-935; Darin Davidson, Merv Letts, Rob Glasgow. Discoid meniscus in children: treatment and outcome. Can J Surg. 2003; 46(5
 found one meniscal ossicle in the posterior horn of the medial meniscus in 126 cadaveric knees. Three theories regarding the etiology of meniscal ossicle prevail in the literature Discoid medial menisci have been reported sporadically in the literature, and their incidence is much lower than that of discoid lateral menisci. They should be treated according to the algorithm mentioned earlier, with an understanding that discoid medial menisci are more often stable than discoid lateral menisci, given their typically more robust capsular attachments. The Wrisberg-type discoid meniscus is of normal shape but has a hypermobile posterior horn due to absence of the normal fascicles, which attach it to the joint capsule and tibia [8–12].
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). Healthy meniscus is shaped like crescent moons (in fact, “meniscus” comes from the Greek word for crescent).
The discoid meniscus is an anatomical variant of the normal meniscus where it is broader and saucer-shaped. 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. Discoid menisci of the knee are not uncommon, and the criteria for arthrographic diagnosis and the clinical symptoms are well known. Although enlarged menisci have been recognized at magnetic resonance (MR) imaging, there are no criteria for the MR imaging diagnosis.
Although enlarged menisci have been recognized at magnetic resonance (MR) imaging, there are no criteria for the MR imaging diagnosis. The authors describe 29 discoid menisci imaged by means of MR. A discoid meniscus was said to be present if three or more 5 …
Hypermobile Discoid Lateral Meniscus Section. Musculoskeletal system . Case Type. Clinical Cases Authors. Ahmed Coronal PD Fat Sat MRI of the knee showing discoid lateral meniscus with peripheral separation of the meniscus .
The meniscus is a cushion structure made of cartilage which fits within the knee joint Discoid meniscus does not require treatment as long as patients are asymptomatic or they have only minor symptoms 7,8. However, this patient suffers pain and has clinical symptoms after a twisting injury. MRI shows a discoid lateral meniscus wi Discoid meniscus is an abnormality in which the cartilaginous meniscus is differently shaped, thick, and contains less collagen.
The musculoskeletal radiologist should consider this diagnosis whenever a discoid lateral meniscus is identified because making this elusive diagnosis may prove immensely useful for the orthopedic surgeon. There is a discoid lateral meniscus without evidence of a lateral meniscal tear.
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discoid meniscus is larger than usual; also referred to as "popping knee syndrome" Epidemiology . incidence . present in 3-5% of population; etiology . failure of apoptosis in utero ; location . usually lateral meniscus involved; 25% bilateral; Classification
A … The Wrisberg variant of the discoid lateral meniscus is a rare condition with a highly suggestive clinical history. The musculoskeletal radiologist should consider this diagnosis whenever a discoid lateral meniscus is identified because making this elusive diag-nosis may prove immensely useful for the orthopedic surgeon. Discoid meniscus is a spectrum of disorders of meniscal shape and stability that have been classified as complete or incomplete, stable or unstable. In addition to the existing MR imaging criteria of diagnosing tears in nondiscoid meniscus, the presence of increased intrameniscal signal in discoid meniscus along with shape deformation may represent a tear. A: According to the Watanabe classification, the discoid lateral meniscus can be classified into complete, incomplete and the Wrisberg variant.
Discoid menisci of the knee are not uncommon, and the criteria for arthrographic diagnosis and the clinical symptoms are well known. Although enlarged menisci have been recognized at magnetic resonance (MR) imaging, there are no criteria for the MR imaging diagnosis. The authors describe 29 discoid menisci imaged by means of MR. A discoid meniscus was said to be present if three or more 5-mm
Discoid menisci have decreased collagen fibers and loss of normal collagen orientation, which predisposes Radiographic features.
diagnosis can be made with 3 or more 5mm sagittal images with meniscal continuity ("bow-tie sign") sagittal MRI will show abnormally thick and flat meniscus. coronal MRI will show thick and flat meniscal tissue extending across entire lateral compartment.