Joong Il Kim, Jong-Keun Kim, Min Wook Kang, Hyuk-Soo Han
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During the subgroup analysis, MD-ACL patients were divided into the non-OA subgroup (n = 41) and OA subgroup (n = 26). The pain location and characteristics of the knee, PTS, and NWI were compared between these subgroups.</p><p><strong>Results: </strong>Compared to the control group, the MD group had a lower NWI (0.26 ± 0.03 vs. 0.28 ± 0.01, <i>p</i> < 0.001) and a larger PTS (11.3° ± 3.0° vs. 9.2° ± 2.5°, <i>p</i> < 0.001). During the subgroup analysis, the most common pain locations were the posterior and medial aspects of the knee in the non-OA subgroup (43.9%) and OA subgroup (53.8%), respectively. Pain on terminal flexion was the most common pain characteristic in both subgroups (non-OA subgroup, 73.1%; OA subgroup, 53.8%). The PTS was not different between subgroups (11.7° ± 3.2° in the non-OA subgroup vs. 10.6° ± 2.7° in the OA subgroup; <i>p</i> = 0.159). However, the non-OA subgroup had a lower NWI than the OA subgroup (0.25 ± 0.03 vs. 0.28 ± 0.02, <i>p</i> = 0.001).</p><p><strong>Conclusions: </strong>Patients with MD-ACL had a lower NWI and a larger PTS than patients with a normal ACL. Furthermore, the clinical and radiological features of MD-ACL differed according to the knee OA status. A narrow intercondylar notch may be more closely associated with the development of MD-ACL without OA.</p>","PeriodicalId":47648,"journal":{"name":"Clinics in Orthopedic Surgery","volume":"1 1","pages":"405-412"},"PeriodicalIF":1.9000,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11130624/pdf/","citationCount":"0","resultStr":"{\"title\":\"Do the Clinical and Radiological Features of Knees with Mucoid Degeneration of the Anterior Cruciate Ligament Differ According to Knee Osteoarthritis Status?\",\"authors\":\"Joong Il Kim, Jong-Keun Kim, Min Wook Kang, Hyuk-Soo Han\",\"doi\":\"10.4055/cios23051\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>The etiology and pathology of mucoid degeneration of the anterior cruciate ligament (MD-ACL) remain poorly understood. MD-ACL may be associated with knee osteoarthritis (OA) or a mechanism other than OA. This study evaluated the radiological differences between knees with MD-ACL and those with a normal ACL and compared the clinical and radiological features of knees with MD-ACL according to the knee OA status.</p><p><strong>Methods: </strong>This retrospective study compared the radiological features of the intercondylar notch width index (NWI) and posterior tibial slope (PTS) of 67 MD-ACL patients (MD group) and 67 age-, sex-, and OA grade-matched patients with a normal ACL (control group). During the subgroup analysis, MD-ACL patients were divided into the non-OA subgroup (n = 41) and OA subgroup (n = 26). The pain location and characteristics of the knee, PTS, and NWI were compared between these subgroups.</p><p><strong>Results: </strong>Compared to the control group, the MD group had a lower NWI (0.26 ± 0.03 vs. 0.28 ± 0.01, <i>p</i> < 0.001) and a larger PTS (11.3° ± 3.0° vs. 9.2° ± 2.5°, <i>p</i> < 0.001). During the subgroup analysis, the most common pain locations were the posterior and medial aspects of the knee in the non-OA subgroup (43.9%) and OA subgroup (53.8%), respectively. Pain on terminal flexion was the most common pain characteristic in both subgroups (non-OA subgroup, 73.1%; OA subgroup, 53.8%). The PTS was not different between subgroups (11.7° ± 3.2° in the non-OA subgroup vs. 10.6° ± 2.7° in the OA subgroup; <i>p</i> = 0.159). However, the non-OA subgroup had a lower NWI than the OA subgroup (0.25 ± 0.03 vs. 0.28 ± 0.02, <i>p</i> = 0.001).</p><p><strong>Conclusions: </strong>Patients with MD-ACL had a lower NWI and a larger PTS than patients with a normal ACL. Furthermore, the clinical and radiological features of MD-ACL differed according to the knee OA status. 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引用次数: 0
摘要
背景：前十字韧带粘液变性（MD-ACL）的病因和病理仍不甚明了。MD-ACL 可能与膝关节骨性关节炎（OA）有关，也可能与 OA 以外的其他机制有关。本研究评估了患有 MD-ACL 的膝关节与前交叉韧带正常的膝关节之间的放射学差异，并根据膝关节 OA 状态比较了患有 MD-ACL 的膝关节的临床和放射学特征：这项回顾性研究比较了 67 名 MD-ACL 患者（MD 组）和 67 名年龄、性别和 OA 等级匹配的前交叉韧带正常患者（对照组）的髁间切迹宽度指数（NWI）和胫骨后斜坡（PTS）的放射学特征。在亚组分析中，MD-ACL 患者被分为非 OA 亚组（41 人）和 OA 亚组（26 人）。结果显示，与对照组相比，MD-ACL患者的膝关节疼痛部位和特征、PTS和NWI均低于对照组：与对照组相比，MD 组的 NWI 更低（0.26 ± 0.03 vs. 0.28 ± 0.01，P < 0.001），PTS 更大（11.3° ± 3.0° vs. 9.2° ± 2.5°，P < 0.001）。在亚组分析中，非 OA 亚组（43.9%）和 OA 亚组（53.8%）最常见的疼痛部位分别是膝关节后侧和内侧。末端屈曲时的疼痛是两个亚组最常见的疼痛特征（非 OA 亚组，73.1%；OA 亚组，53.8%）。亚组之间的 PTS 没有差异（非 OA 亚组为 11.7° ± 3.2° vs. OA 亚组为 10.6° ± 2.7°；P = 0.159）。然而，非 OA 亚组的 NWI 低于 OA 亚组（0.25 ± 0.03 vs. 0.28 ± 0.02，p = 0.001）：结论：与前交叉韧带正常的患者相比，MD-ACL 患者的 NWI 更低，PTS 更大。此外，膝关节 OA 状态不同，MD-ACL 的临床和放射学特征也不同。髁间切迹狭窄可能与无 OA 的 MD-ACL 的发生更密切相关。
Do the Clinical and Radiological Features of Knees with Mucoid Degeneration of the Anterior Cruciate Ligament Differ According to Knee Osteoarthritis Status?
Background: The etiology and pathology of mucoid degeneration of the anterior cruciate ligament (MD-ACL) remain poorly understood. MD-ACL may be associated with knee osteoarthritis (OA) or a mechanism other than OA. This study evaluated the radiological differences between knees with MD-ACL and those with a normal ACL and compared the clinical and radiological features of knees with MD-ACL according to the knee OA status.
Methods: This retrospective study compared the radiological features of the intercondylar notch width index (NWI) and posterior tibial slope (PTS) of 67 MD-ACL patients (MD group) and 67 age-, sex-, and OA grade-matched patients with a normal ACL (control group). During the subgroup analysis, MD-ACL patients were divided into the non-OA subgroup (n = 41) and OA subgroup (n = 26). The pain location and characteristics of the knee, PTS, and NWI were compared between these subgroups.
Results: Compared to the control group, the MD group had a lower NWI (0.26 ± 0.03 vs. 0.28 ± 0.01, p < 0.001) and a larger PTS (11.3° ± 3.0° vs. 9.2° ± 2.5°, p < 0.001). During the subgroup analysis, the most common pain locations were the posterior and medial aspects of the knee in the non-OA subgroup (43.9%) and OA subgroup (53.8%), respectively. Pain on terminal flexion was the most common pain characteristic in both subgroups (non-OA subgroup, 73.1%; OA subgroup, 53.8%). The PTS was not different between subgroups (11.7° ± 3.2° in the non-OA subgroup vs. 10.6° ± 2.7° in the OA subgroup; p = 0.159). However, the non-OA subgroup had a lower NWI than the OA subgroup (0.25 ± 0.03 vs. 0.28 ± 0.02, p = 0.001).
Conclusions: Patients with MD-ACL had a lower NWI and a larger PTS than patients with a normal ACL. Furthermore, the clinical and radiological features of MD-ACL differed according to the knee OA status. A narrow intercondylar notch may be more closely associated with the development of MD-ACL without OA.
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