TY - JOUR
T1 - Bilateral discoid lateral meniscus in knees
T2 - Evaluation of the contralateral knee in patients with symptomatic discoid lateral meniscus
AU - Ahn, Jin Hwan
AU - Lee, Sang Hak
AU - Yoo, Jae Chul
AU - Lee, Han Jun
AU - Lee, Jae Sung
PY - 2010/10
Y1 - 2010/10
N2 - Purpose: The aim of this study was to analyze, by use of magnetic resonance imaging (MRI), the contralateral discoid lateral meniscus (DLM) status of 33 patients who underwent an operation for a symptomatic DLM. Methods: This diagnostic study included 33 consecutive patients who underwent arthroscopic surgery for a unilaterally symptomatic DLM. All patients' contralateral knees were checked with simple radiographs and MRI scans. Knees were also evaluated through physical examinations and a clinical scoring system. On the basis of the MRI findings, DLM was categorized into 3 types: normal type, incomplete discoid type, and complete discoid type. The tear patterns of the lateral menisci as imaged by radiographs and the associated chondral lesions imaged by MRI were analyzed by consensus in the bilateral knees. Results: All but 1 of the contralateral, asymptomatic knees (97%) were diagnosed by MRI to have complete or incomplete DLM. DLMs with tears were found in the contralateral knees in 11 cases (33%), and chondral lesions were found in 4 (12%) of the complete discoid type cases. On radiography, 23 (70%) of the 33 contralateral knees showed characteristic findings of DLM. We found that 29 pairs of knees (88%) had the same lateral meniscus shape on MRI. A κ analysis showed significant and good agreement between the radiographic findings, the tear pattern of the lateral menisci, and the associated chondral lesions on MRI scans in bilateral knees. Conclusions: DLM commonly occurs bilaterally in patients with symptomatic, unilateral surgical DLM, although this finding was applicable only to young, Asian male patients. Characteristic radiographic findings and the MRI findings of symptomatic DLM patients were significantly correlated between both knees. Level of Evidence: Level I, testing of previously developed diagnostic criteria in a series of consecutive patients with universally applied reference gold standard.
AB - Purpose: The aim of this study was to analyze, by use of magnetic resonance imaging (MRI), the contralateral discoid lateral meniscus (DLM) status of 33 patients who underwent an operation for a symptomatic DLM. Methods: This diagnostic study included 33 consecutive patients who underwent arthroscopic surgery for a unilaterally symptomatic DLM. All patients' contralateral knees were checked with simple radiographs and MRI scans. Knees were also evaluated through physical examinations and a clinical scoring system. On the basis of the MRI findings, DLM was categorized into 3 types: normal type, incomplete discoid type, and complete discoid type. The tear patterns of the lateral menisci as imaged by radiographs and the associated chondral lesions imaged by MRI were analyzed by consensus in the bilateral knees. Results: All but 1 of the contralateral, asymptomatic knees (97%) were diagnosed by MRI to have complete or incomplete DLM. DLMs with tears were found in the contralateral knees in 11 cases (33%), and chondral lesions were found in 4 (12%) of the complete discoid type cases. On radiography, 23 (70%) of the 33 contralateral knees showed characteristic findings of DLM. We found that 29 pairs of knees (88%) had the same lateral meniscus shape on MRI. A κ analysis showed significant and good agreement between the radiographic findings, the tear pattern of the lateral menisci, and the associated chondral lesions on MRI scans in bilateral knees. Conclusions: DLM commonly occurs bilaterally in patients with symptomatic, unilateral surgical DLM, although this finding was applicable only to young, Asian male patients. Characteristic radiographic findings and the MRI findings of symptomatic DLM patients were significantly correlated between both knees. Level of Evidence: Level I, testing of previously developed diagnostic criteria in a series of consecutive patients with universally applied reference gold standard.
UR - https://www.scopus.com/pages/publications/77957373787
U2 - 10.1016/j.arthro.2010.02.008
DO - 10.1016/j.arthro.2010.02.008
M3 - Article
C2 - 20729026
AN - SCOPUS:77957373787
SN - 0749-8063
VL - 26
SP - 1348
EP - 1356
JO - Arthroscopy - Journal of Arthroscopic and Related Surgery
JF - Arthroscopy - Journal of Arthroscopic and Related Surgery
IS - 10
ER -