Magnetic resonance imaging and arthroscopy of a discoid lateral meniscus in a dog

2001 ◽  
Vol 14 (02) ◽  
pp. 90-94 ◽  
Author(s):  
J. Scheidegger ◽  
H. Nötzli ◽  
U. Rytz ◽  
S. Ohlerth ◽  
J. Lang
Keyword(s):  
Magnetic Resonance ◽  
Cruciate Ligament ◽  
Lateral Meniscus ◽  
Magnetic Resonance Tomography ◽  
Joint Effusion ◽  
Discoid Lateral Meniscus ◽  
Discoid Meniscus ◽  
Cranial Cruciate Ligament ◽  
Low Field ◽  
Hindlimb Lameness

SummaryFor the first time in veterinary literature, magnetic resonance and arthroscopic features of a discoid lateral meniscus in a dog are described. A 15-monthold Labrador Retriever with a history of mild intermittent left hindlimb lameness was referred to our clinic. Physical examination revealed mild joint effusion of the left stifle and absence of a cranial drawer motion and tibial compression test. Survey radiographs demonstrated mild joint effusion and peri-articular new bone formation. Low-field magnetic resonance tomography of the left stifle joint demonstrated injury of the cranial cruciate ligament and a discoid lateral meniscus. Two weeks later, arthroscopy revealed a partial tear of the cranial cruciate ligament with mild synovitis. Furthermore, some fibres inserted abnormally cranial to the inter-meniscal and cranial tibial ligament of the medial meniscus. The lateral meniscus was discoid in shape. Subsequent arthrotomy confirmed the diagnoses. Discoid meniscus is a rare finding in the dog with unknown clinical relevance whereas it is well known in humans.A 15-month-old Labrador Retriever with mild left hindlimb lameness, mild joint effusion of the left stifle but without signs of stifle instability is presented in this report. Low-field magnetic resonance tomography demonstrated injury of the cranial cruciate ligament and a discoid lateral meniscus. Subsequent arthroscopy and arthrotomy confirmed these findings. A literature review on discoid meniscus in humans and in dogs is presented.

scholarly journals Assessment of the usefulness of image reconstruction in the oblique and double-oblique sagittal planes for magnetic resonance imaging of the canine cranial cruciate ligament

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Adam Przeworski ◽  
Zbigniew Adamiak ◽  
Michał Nowicki ◽  
Marta Mieszkowska ◽  
Angelika Tobolska ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Cruciate Ligament ◽  
Magnetic Resonance Tomography ◽  
Cranial Cruciate Ligament ◽  
Stifle Joint ◽  
Frequent Use ◽  
3D Sequences

Abstract Introduction The aim of the study was to determine the quality and significance of the magnetic resonance image of the canine knee after reconstruction in the oblique and double-oblique sagittal plane. This reconstruction and 3D images are rarely used in common protocols due to the longer study time they require. The study aimed to demonstrate significance for such diagnostic images in specific sequences in order to stimulate consideration of their more frequent use in diagnosis of diseases of the cruciate ligament in dogs. Material and Methods All tests were carried out using an open magnetic resonance tomography scanner with magnetic field induction. The images obtained from the 30 canine patients examined were reconstructed and evaluated by independent appraisers. Statistical analysis was performed. Results The study showed that MRI of the stifle joint using 3D sequences provides higher quality images of the cranial cruciate ligament in dogs. The results of the statistical analysis showed that multi-faceted reconstruction allows the secondary determination of the oblique imaging planes and obtains images of adequate quality. Conclusion It can be concluded that multi-faceted reconstruction facilitates the secondary determination of oblique imaging planes. This reconstruction additionally makes images available of better quality compared to the 2D sequence.

An Unusual Deformity of the Lateral Meniscus in a Dog

1988 ◽  
Vol 01 (03/04) ◽  
pp. 148-151
Author(s):  
G. M. Robins
Keyword(s):  
Cruciate Ligament ◽  
Lateral Meniscus ◽  
Clinical Findings ◽  
Discoid Meniscus ◽  
Cranial Cruciate Ligament ◽  
Meniscal Lesions

In the dog meniscal injuries are usually secondary to rupture of the cranial cruciate ligament. In man a discoid meniscus is a well recognised morphological anomaly of the knee (5). In contrast discoid meniscal lesions are rarely diagnosed in the dog (6). This paper presents the clinical findings in a dog with a bilateral ring-shaped lateral meniscal deformity and an abnormal location of the tendon of the m. popliteus.

LOW-FIELD MAGNETIC RESONANCE IMAGING OF EARLY SUBCHONDRAL CYST-LIKE LESIONS IN INDUCED CRANIAL CRUCIATE LIGAMENT DEFICIENT DOGS

1998 ◽  
Vol 39 (3) ◽  
pp. 167-173 ◽  
Author(s):  
Debra K. Baird ◽  
John T. Hathcock ◽  
Steven A. Kincaid ◽  
Paul F. Rumph ◽  
John Kammermann ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cruciate Ligament ◽  
Resonance Imaging ◽  
Cranial Cruciate Ligament ◽  
Low Field ◽  
Subchondral Cyst

scholarly journals Comparison of High-field and Low-field Magnetic Resonance Imaging of Stifle Joint Disorders in Dogs

2016 ◽  
Vol 19 (3) ◽  
pp. 663-670 ◽  
Author(s):  
A. Przeworski ◽  
Z. Adamiak ◽  
J. Głodek
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Field ◽  
Cruciate Ligament ◽  
Resonance Imaging ◽  
Cranial Cruciate Ligament ◽  
Stifle Joint ◽  
Low Field ◽  
Secondary Damage ◽  
Magnetic Strength

AbstractThe most common cause of hindlimb lameness in dogs is cranial cruciate ligament rupture. In 48-77.3% of the population this trauma leads to secondary damage of the meniscus. Depending on the magnetic strength of the used device, different diagnostic accuracy can be achieved. The examination sensitivity of magnetic resonance imaging is affected by many factors which are independent of diagnostic strength, such as correct positioning of the patient, size of the stifle joint examined, or selection of the right protocol of sequences. Sensitivity of meniscus damage detection was 100% and 90%, respectively, in high- and low-field magnetic resonance. The best results were reported during examination of the stifle in dogs above 10 kg b.w. at a flexion angle of 145°, and in sagittal and dorsal planes. Regardless of the magnetic strength applied, imaging of the whole cranial cruciate ligament is difficult. Moreover, MRI allows the detection of the first signs of osteoarthritis, which were observed 4 and 6 weeks after rupture of the cranial cruciate ligament using high and low-field MRI. This also applies to lesions in the subchondral bone or a bone marrow which occurred in association with insufficiency of the stifle joint, and were mainly localized in the epiphysis of the femur and tibia. The present article provides a comparison of different examination protocols and images of damaged stifle structures, such as menisci, ligaments and bones of the stifle joint visualized with low-field and high-field magnetic resonance. Magnetic resonance arthrography is also discussed.

MENISCAL ABNORMALITIES: DISCOID MENISCUS

2012 ◽  
Vol 15 (01) ◽  
pp. 1230001
Author(s):  
Vivek Pandey ◽  
Simon Nurettin van Laarhoven ◽  
Kiran K. V. Acharya ◽  
Sharath K. Rao ◽  
Sripathi Rao
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Plain Radiograph ◽  
Lateral Meniscus ◽  
Partial Meniscectomy ◽  
Discoid Lateral Meniscus ◽  
Resonance Imaging ◽  
Discoid Meniscus ◽  
Short Term ◽  
Ring Type

The discoid meniscus is the most common meniscal variant. The likely etiology being congenital, the condition usually affects the lateral meniscus. Poorly vascularized, thicker and unstable, the discoid lateral meniscus (DLM) is more prone to tears due to abnormal shearing forces. Watanabe et al. (1979) classified the discoid lateral meniscus into three types: Complete, incomplete and Wrisberg type; Monllau et al. (1998) added the ring type as the fourth variant. Pain and clicks/thud are the most common presentations. Plain radiograph and magnetic resonance imaging are helpful in confirming the diagnosis. Asymptomatic DLM is best left alone. For symptomatic complete and incomplete types, partial arthroscopic saucerization is the treatment of choice leaving behind a stable rim. The Wrisberg type needs peripheral stabilization with resection of excess rim, if any. Total meniscectomy should be avoided unless inevitable. Short term results after partial meniscectomy are good.

scholarly journals Evolution of Osteochondritis Dissecans of the Lateral Femoral Condyle Combined with Discoid Meniscus

Joints ◽  
2017 ◽  
Vol 05 (02) ◽  
pp. 114-117
Author(s):  
Erica Bulgheroni ◽  
Lorenzo Mattioli ◽  
Paolo Bulgheroni
Keyword(s):  
Magnetic Resonance ◽  
Osteochondritis Dissecans ◽  
Femoral Condyle ◽  
Lateral Meniscus ◽  
Meniscal Repair ◽  
Valgus Deformity ◽  
Lateral Femoral Condyle ◽  
Discoid Lateral Meniscus ◽  
Discoid Meniscus ◽  
Bucket Handle Tear

AbstractThe discoid meniscus is a rare anomaly of the knee that affects mostly the lateral meniscus and is often asymptomatic. The osteochondritis dissecans is a disorder of the subchondral bone and articular cartilage and occurs frequently associated with the discoid lateral meniscus. In the present case, we showed the evolution of this association related to surgical treatment. A patient with lateral knee pain and a magnetic resonance depicting a torn discoid lateral meniscus and osteochondritis dissecans of the lateral femoral condyle was treated with partial meniscectomy and meniscal sutures. After 1 year, the symptoms reappeared, and a new meniscal repair was performed to treat a bucket-handle tear, while cartilage was apparently intact. After 4 years, there was a new recurrence of symptoms, and the knee developed a valgus deformity. Cartilage was treated with microfractures, and a subsequent distal femoral osteotomy associated with lateral meniscal scaffold was performed. The patient was followed up clinically, with radiographs and magnetic resonance for 5 years with an improvement of the results up to 2 years and no signs of deterioration of results over time.

Evaluation of Positive Contrast Arthrography in Canine Cranial Cruciate Ligament Disease

1996 ◽  
Vol 09 (01) ◽  
pp. 10-3 ◽  
Author(s):  
D.N. Aron ◽  
R. Roberts ◽  
J. Stallings ◽  
J. Brown ◽  
C.W. Hay
Keyword(s):  
Articular Surface ◽  
Cruciate Ligament ◽  
Positive Contrast ◽  
Joint Effusion ◽  
Radiographic Evaluation ◽  
Cranial Cruciate Ligament ◽  
Joint Pathology ◽  
Meniscal Pathology ◽  
Cranial Cruciate Ligament Disease ◽  
Better Than

SummaryArthrographic and intraoperative evaluations of stifles affected with cranial cruciate disease were compared. Arthrography did not appear to be helpful in predicting cranial cruciate ligament pathology. The caudal cruciate ligament was consistently not visualized in the arthrograms and was normal at surgery. The menisci were visualized consistently in the arthrograms, but conclusions could not be made as to the benefit of arthrography in predicting meniscal pathology. Arthrography was not helpful in predicting joint capsule and femoral articular surface pathology. Survey radiographic evaluation was better than arthrography in evaluating joint pathology. When cruciate injury is suspected, after history and physical examination, survey radiographs are better than positive contrast arthrograms at supporting the diagnosis.Positive contrast arthrography was evaluated as a diagnostic aid in canine cranial cruciate ligament disease. It did not appear to be useful in predicting joint pathology. With arthrography, both menisci could be visualized and evaluated for abnormalities. Joint effusion and presence of osteophytes evaluated on survey radiographs was better than arthrography in evaluating joint pathology.

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