Facet Joint Hypertrophy is a Misnomer: A Retrospective Study
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One of the major causes of lumbar spinal canal stenosis (LSCS) has been considered facet joint hypertrophy (FJH). However, a previous study asserted that "FJH" is a misnomer because common facet joints are no smaller than degenerative facet joints; however, this hypothesis has not been effectively demonstrated. Therefore, in order to verify that FJH is a misnomer in patients with LSCS, we devised new morphological parameters that we called facet joint thickness (FJT) and facet joint cross-sectional area (FJA).We collected FJT and FJA data from 114 patients with LSCS. A total of 86 control subjects underwent lumbar magnetic resonance imaging (MRI) as part of routine medical examinations, and axial T2-weighted MRI images were obtained from all participants. We measured FJT by drawing a line along the facet area and then measuring the narrowest point at L4-L5. We measured FJA as the whole cross-sectional area of the facet joint at the stenotic L4-L5 level.The average FJT was 1.60 ± 0.36 mm in the control group and 1.11 ± 0.32 mm in the LSCS group. The average FJA was 14.46 ± 5.17 mm in the control group and 9.31 ± 3.47 mm in the LSCS group. Patients with LSCS had significantly lower FJTs (P < .001) and FJAs (P < .001).FJH, a misnomer, should be renamed facet joint area narrowing. Using this terminology would eliminate confusion in descriptions of the facet joint.
Lee K, Jeong H, Park C, Kim M, Ryu H, Roh J Taehan Yongsang Uihakhoe Chi. 2022; 82(4):862-875.
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Wang A, Wang T, Zang L, Yuan S, Fan N, Du P J Pain Res. 2022; 15:2363-2371.
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Oldweiler A, Martin J Clin Biomech (Bristol). 2021; 88:105425.
PMID: 34289433 PMC: 8490326. DOI: 10.1016/j.clinbiomech.2021.105425.
Xue J, Chen H, Zhu B, Li X, Ouyang Z, Li S BMC Musculoskelet Disord. 2021; 22(1):236.
PMID: 33648479 PMC: 7923329. DOI: 10.1186/s12891-021-04100-3.