Generally, congenital anomalies affect the lateral meniscus, most commonly a discoid meniscus, although discoid medial menisci can occur much less frequently. We will review the common meniscal variants, which include hypoplastic menisci, absent menisci, anomalous insertion of the medial meniscus, discoid lateral meniscus, including the Wrisberg variant, and discoid medial meniscus.
Conclusions: Discoid medial menisci are a rare cause of medial knee pain and should be con- sidered if classic MRI findings are associated with mechanical
This is a normal variant caused by a vacuum phenomenon. Dr. Ebraheim’s educational animated video describes Discoid meniscus. The meniscus is a cushion structure made of cartilage which fits within the knee joint 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.
A meniscus is a crescent-shaped fibrocartilaginous structure that partly divides a joint cavity, unlike articular discs, which completely separate the cavity. Menisci are present in the knees and the acromioclavicular, sternoclavicular, and temporomandibular joints. 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 meniscus 䡧On sagittal images, a continuous bow-tie appearance on 3 or more 4 mm slices (12 mm) 䡧Up to 2 mm higher than the opposite meniscus
When present, it is bilateral in 20% of cases. Discoid meniscus is seen more frequently in children and adolescents; thus, some authors suggest it may regress in maturity. Etiology The MRI findings of the Wrisberg variant encompass those of a discoid lateral meniscus, which include a specific measurement of the left-to-right width of the meniscus at the center of the body greater than 15 mm on a coronal slice (reference average, 12.8 mm) [3, 4]. Alternatively, a discoid lateral meniscus shows more than two meniscal body segments on consecutive sagittal images of the knee.
11 Feb 2013 The coronal MRI will show thick and flat meniscus extending beyond the halfway Watanabe classification of discoid lateral meniscus: •Type I:
Webbplats om utbildning. Physiotutors. Webbplats om utbildning. MSK Radiology Genie. Matteo DENTI, MD, PhD Discoid meniscus in children - Prof. 11 SCIENTIFIC 22 March, Day 2 Maple Hall RADIOLOGY SYMPOSIUM: Imaging and beyond Radiologic Findings in Two Cases of Schmorl Nodes of the Thoracic and Lumbar Spine: Radiographic-.
During arthroscopy a tear may not be visualized in some symptomatic discoid menisci. Therefore, a preoperative MRI is mandatory for all discoid menisci,
Discoid meniscus - Imaging pearls.
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Discoid Medial Meniscus | Radiology Discoid lateral meniscus is one of the most common knee problems in clinical practice. Several radiographic findings have been reported to screen discoid lateral meniscus, but the diagnostic value of those signs varies.We introduce a new method of measurement on plain radiograph for initial screening discoid lateral meniscus and describe its efficacy and correlation to symptomatic discoid 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 diagnosis may prove immensely useful for the orthopedic surgeon. THE DISCOID LATERAL MENISCUS (DLM) is an ana-tomic variant of the meniscus, in which the meniscus is thickened and discoid shaped, and the DLM covers a greater area of the tibial plateau than the normal meniscus. Discoid lateral meniscus (DLM) has a reported prevalence that ranges from 0.4 to 17% (1–3), occurring at a higher rate in Asian populations A radial tear is present at the posterior root junction of the medial meniscus which extends through the entire thickness of the meniscus with a cleft of fluid tracking through the defect (red arrows).
At first impression this looks like a tear within a discoid meniscus.
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Discoid lateral meniscus is a common abnormal meniscal variant in children. Detailed history and physical examination combined with an MRI of the knee predictably diagnose a discoid meniscus. The clinical presentation varies from being asymptomatic to snapping, locking, and causing severe pain and s …
Arthroscopy. 2000;16:511-516. Samoto N, Kozuma M, Tokuhisa T, Kobayashi K. Diagnosis of discoid lateral meniscus of the knee on MR imaging.