PURPOSE: To compare magnetic resonance (MR) signal intensity in the medial meniscus at the time of displacement and after its reduction in patients with a displaced bucket-handle tear of the meniscus associated with anterior cruciate ligament (ACL) injury. METHODS: Nine chronic ACL-deficient patients (3 male, 6 female, mean age 29 years) with locking due to a displaced fragment of the medial meniscus following a bucket-handle tear were involved in this study. In all patients, the following two-stage surgeries were planned as follows: first operation, arthroscopic reduction of the meniscus; second operation, meniscal repair and ACL reconstruction after immobilization for 1-2 weeks. Magnetic resonance imaging (MRI) evaluation using coronal T2*-weighted images was performed when the knee was locked and after the meniscus was reduced. Signal intensity before and after meniscal reduction was compared in the same patients. RESULTS: In 8 of the 9 patients, the displaced fragment exhibited high signal intensity in 1 patient and mildly high in 7 patients. After its reduction, the signal intensity changed to low in all 8 patients. CONCLUSIONS: A high-intensity signal in the displaced fragment of the medial meniscus may change to low after its reduction to its original position. Therefore, at the time of decision-making regarding meniscus repair for a displaced meniscus in a locked knee, surgeons should give priority to arthroscopic findings rather than to signal intensity on MRI. LEVEL OF EVIDENCE: Diagnostic study, Level III.
PURPOSE: To compare magnetic resonance (MR) signal intensity in the medial meniscus at the time of displacement and after its reduction in patients with a displaced bucket-handle tear of the meniscus associated with anterior cruciate ligament (ACL) injury. METHODS: Nine chronic ACL-deficientpatients (3 male, 6 female, mean age 29 years) with locking due to a displaced fragment of the medial meniscus following a bucket-handle tear were involved in this study. In all patients, the following two-stage surgeries were planned as follows: first operation, arthroscopic reduction of the meniscus; second operation, meniscal repair and ACL reconstruction after immobilization for 1-2 weeks. Magnetic resonance imaging (MRI) evaluation using coronal T2*-weighted images was performed when the knee was locked and after the meniscus was reduced. Signal intensity before and after meniscal reduction was compared in the same patients. RESULTS: In 8 of the 9 patients, the displaced fragment exhibited high signal intensity in 1 patient and mildly high in 7 patients. After its reduction, the signal intensity changed to low in all 8 patients. CONCLUSIONS: A high-intensity signal in the displaced fragment of the medial meniscus may change to low after its reduction to its original position. Therefore, at the time of decision-making regarding meniscus repair for a displaced meniscus in a locked knee, surgeons should give priority to arthroscopic findings rather than to signal intensity on MRI. LEVEL OF EVIDENCE: Diagnostic study, Level III.
Authors: G Nourissat; P Beaufils; O Charrois; T Ait Si Selmi; P Thoreux; B Moyen; X Cassard Journal: Knee Surg Sports Traumatol Arthrosc Date: 2008-05 Impact factor: 4.342
Authors: Michel D Crema; David J Hunter; Frank W Roemer; Ling Li; Monica D Marra; Marcello H Nogueira-Barbosa; Marie-Pierre Hellio Le Graverand; Bradley T Wyman; Ali Guermazi Journal: Skeletal Radiol Date: 2011-05-08 Impact factor: 2.199
Authors: Yu Miao; Jia-Kuo Yu; Ying-Fang Ao; Zhuo-Zhao Zheng; Xi Gong; Kevin Kar Ming Leung Journal: Am J Sports Med Date: 2011-01-10 Impact factor: 6.202