Julio Brandao Guimaraes1,2,3, Luca Facchetti4, Benedikt J Schwaiger4,5, Alexandra S Gersing4,5, Xiaojuan Li4, Thomas M Link4. 1. Department of Radiology and Biomedical Imaging, University of California, 185 Berry St, Suite 350, San Francisco, CA, 94158, USA. Julio.BrandaoGuimaraes@ucsf.edu. 2. Department of Radiology, Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil. Julio.BrandaoGuimaraes@ucsf.edu. 3. Department of Radiology, DASA Laboratory, Sao Paulo, Brazil. Julio.BrandaoGuimaraes@ucsf.edu. 4. Department of Radiology and Biomedical Imaging, University of California, 185 Berry St, Suite 350, San Francisco, CA, 94158, USA. 5. Department of Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany.
Abstract
OBJECTIVES: To assess (i) normal imaging anatomy of the popliteomeniscal fascicles, (ii) prevalence and natural evolution of popliteomeniscal fascicle tears (PMFT) in subjects with traumatic anterior cruciate ligament (ACL) tears over 2 years and (iii) compare knee cartilage degeneration in subjects with and without PMFT longitudinally. METHODS: 57 subjects with ACL tears were screened for PMFT. Morphological (high-resolution 3D fast spin-echo) and compositional (T1ρ and T2 mapping) MR imaging was performed prior to and 2 years after ACL reconstruction. Differences of morphological and compositional parameters were compared between subjects with and without PMFT using logistic regression, adjusting for age, sex and BMI. RESULTS: In 24% (n = 14) of the subjects with ACL tear a PMFT was detected on baseline MRI. One subject with PMFT developed a meniscal tear over 2 years. Cartilage ∆T1ρ of the lateral femur increased significantly more in subjects with isolated PMFT compared to controls (mean difference, 2.0 ± 2.9 vs. -1.3 ± 1.6, p = 0.027). CONCLUSION: PMFT detected by MRI are a common finding in subjects with ACL tears. Subjects with these defects showed higher compositional cartilage deterioration compared to controls, over 2 years in the lateral femoral compartment, indicating accelerated cartilage degeneration. KEY POINTS: • Popliteomeniscal fascicle lesions are a common finding in subjects with ACL tears. • Progression to a meniscal tear over 2 years is not frequent. • Anteroinferior popliteomeniscal fascicle is injured most frequently. • Patients with popliteomeniscal fascicle lesions showed accelerated cartilage degeneration.
OBJECTIVES: To assess (i) normal imaging anatomy of the popliteomeniscal fascicles, (ii) prevalence and natural evolution of popliteomeniscal fascicle tears (PMFT) in subjects with traumatic anterior cruciate ligament (ACL) tears over 2 years and (iii) compare knee cartilage degeneration in subjects with and without PMFT longitudinally. METHODS: 57 subjects with ACL tears were screened for PMFT. Morphological (high-resolution 3D fast spin-echo) and compositional (T1ρ and T2 mapping) MR imaging was performed prior to and 2 years after ACL reconstruction. Differences of morphological and compositional parameters were compared between subjects with and without PMFT using logistic regression, adjusting for age, sex and BMI. RESULTS: In 24% (n = 14) of the subjects with ACL tear a PMFT was detected on baseline MRI. One subject with PMFT developed a meniscal tear over 2 years. Cartilage ∆T1ρ of the lateral femur increased significantly more in subjects with isolated PMFT compared to controls (mean difference, 2.0 ± 2.9 vs. -1.3 ± 1.6, p = 0.027). CONCLUSION:PMFT detected by MRI are a common finding in subjects with ACL tears. Subjects with these defects showed higher compositional cartilage deterioration compared to controls, over 2 years in the lateral femoral compartment, indicating accelerated cartilage degeneration. KEY POINTS: • Popliteomeniscal fascicle lesions are a common finding in subjects with ACL tears. • Progression to a meniscal tear over 2 years is not frequent. • Anteroinferior popliteomeniscal fascicle is injured most frequently. • Patients with popliteomeniscal fascicle lesions showed accelerated cartilage degeneration.
Authors: Hollis G Potter; Sapna K Jain; Yan Ma; Brandon R Black; Sebastian Fung; Stephen Lyman Journal: Am J Sports Med Date: 2011-09-27 Impact factor: 6.202
Authors: P T Simonian; P S Sussmann; T L Wickiewicz; H G Potter; M van Trommel; S Weiland-Holland; R F Warren Journal: Arthroscopy Date: 1997-10 Impact factor: 4.772