Background: The menisci and collateral ligaments of the knee are complex structures with various 
important functions within the knee. Loss of the menisci or collateral ligaments leads to a 
significantly increased risk of developing degenerative changes in the long term. Purpose: This study 
aimed to investigate the diagnostic value of high frequency musculoskeletal ultrasound in detection 
and evaluation of menisco-collateral complex abnormalities of the knee joint in comparison with 
magnetic resonance imaging, arthroscopy and clinical findings. Patients and Methods: This study 
included 50 patients, presented by pain, swelling, stiffness/limitation of movement or a history of 
acute/chronic knee trauma, in the duration between August 2018 and November 2019. The research 
was carried on the Radiology Department, Minia university Hospital. All patients underwent 
musculoskeletal ultrasound in different position then underwent magnetic resonance imaging included 
different pulse sequences and scanning planes, some of them underwent arthroscopy. Results: This 
study included 50 patients, 30(60%) males and 20(40%) females. Male patient's age ranged between 
19 and 55 years with a mean of 31.18 ± 10.89 SD, while female patient's age ranged between 19 and 
56 years with a mean of 42.60 ± 11.41SD. Conclusion: High resolution ultrasonography had high 
accuracy in detecting presence of tears in both the menisci and collateral ligaments. MRI is more 
sensitive in detection and determines types of tears than US.