Zhiyou Zhou1, Lei Xiao2, Chongru He1, Yongjin Zhang1, Chenchen Xue1, Suchi Qiao1, Guobin Zhang1, Zimin Wang3. 1. Department of Orthopedics, Changhai Hospital Affiliated to Second Military Medical University, Shanghai, China. 2. The Orthopedics Department, NO.515 Hospital of PLA, Wuxi, China. 3. Department of Orthopedics, Changhai Hospital Affiliated to Second Military Medical University, Shanghai, China. Electronic address: drwangzimin@126.com.
Abstract
PURPOSE: The assisted inferior anterolateral portal under anterior horn of the lateral meniscus (UAHLM portal) was applied to treat the lateral discoid meniscus injury conveniently and the clinical outcomes were evaluated. METHODS: A retrospective review was conducted on 60 patients who underwent arthroscopic surgery with a symptomatic discoid lateral meniscus. Normal anterolateral/anteromedial portals assisted with UAHLM portal (1-2 cm inferior to the anterolateral portal) were used. All patients were followed up for 24-48 months (median, 33 months) and evaluated by MRI images and clinical outcomes including clinical findings, Lysholm scores and IKDC scores. RESULTS: After meniscus plasty with or without repair, most of the upper layer of lateral meniscuses was retained. A total of 54 patients (16 males and 38 females, 42 ± 17.8 years old) showed satisfactory clinical results without requiring reoperation after a median follow-up time of 33 months. At final follow-up, a full range of motion was achieved in all patients. MRI indicated the thickness of anterior horn of lateral meniscus was (5.38 ± 1.09 mm) before the operation and (4.04 ± 0.71 mm) after the operation at the 2-year follow-up; clinical outcomes were improved significantly than the baseline: positive McMurray test (50 vs. 2, P< 0.001), Lysholm score (64.9 ± 9.0 vs. 94.7 ± 4.9, P< 0.001), and IKDC score (54.4 ± 7.7 vs. 92.6 ± 4.3, P< 0.001). No significant complication was observed during the follow-up. CONCLUSION: Thus, this technique with assisted UAHLM portal was convenient for arthroscopic discoid meniscus plasty and meniscus repair and served as an effective method in patients with a symptomatic discoid lateral.
PURPOSE: The assisted inferior anterolateral portal under anterior horn of the lateral meniscus (UAHLM portal) was applied to treat the lateral discoid meniscus injury conveniently and the clinical outcomes were evaluated. METHODS: A retrospective review was conducted on 60 patients who underwent arthroscopic surgery with a symptomatic discoid lateral meniscus. Normal anterolateral/anteromedial portals assisted with UAHLM portal (1-2 cm inferior to the anterolateral portal) were used. All patients were followed up for 24-48 months (median, 33 months) and evaluated by MRI images and clinical outcomes including clinical findings, Lysholm scores and IKDC scores. RESULTS: After meniscus plasty with or without repair, most of the upper layer of lateral meniscuses was retained. A total of 54 patients (16 males and 38 females, 42 ± 17.8 years old) showed satisfactory clinical results without requiring reoperation after a median follow-up time of 33 months. At final follow-up, a full range of motion was achieved in all patients. MRI indicated the thickness of anterior horn of lateral meniscus was (5.38 ± 1.09 mm) before the operation and (4.04 ± 0.71 mm) after the operation at the 2-year follow-up; clinical outcomes were improved significantly than the baseline: positive McMurray test (50 vs. 2, P< 0.001), Lysholm score (64.9 ± 9.0 vs. 94.7 ± 4.9, P< 0.001), and IKDC score (54.4 ± 7.7 vs. 92.6 ± 4.3, P< 0.001). No significant complication was observed during the follow-up. CONCLUSION: Thus, this technique with assisted UAHLM portal was convenient for arthroscopic discoid meniscus plasty and meniscus repair and served as an effective method in patients with a symptomatic discoid lateral.