الفهرس 
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Abstract
The knee joint is one of the most commonly injured joints in the body. Because of its complex structure, this joint is subjected to numerous pathologies and due to the recent increase in various sport activities, there has been a parallel increase in sport-induced internal derangements of the knee.
The main strength of knee MRI is the assessment of articular and Peri-articular diseases. The specific structures best suited for MRI assessment include tendons, muscles and ligaments, as well as peri-articular soft tissue masses. Joint effusions, synovial thickening, bursal fluid collections, intra-articular loose bodies, ganglion cysts and articular surface erosions. Also, as regard the cruciate and meniscal lesions, which when clinically suspected, MRI is preferably advised.
The purpose of this study is to detect the accuracy of MR imaging as a diagnostic tool in the evaluation of different knee joint pathologies that cause anterior knee pain, with emphasis on some of their grades and types for better assessment.
AKP is the most common complaint of the knee joint, which can be secondary to a variety of etiologies. We have reviewed several of the most common causes of AKP, falling into five broad categories of diseases which are, Quadriceps tendon abnormalities including (quadriceps tendinopathy and quadriceps tendon tear). Patellar tendon abnormalities including (patellar tendinopathy and Osgood Schlatter disease). Patellar abnormalities including (chondromalacia patella, patellar instability, transient patellar dislocation and painful bipartite patella), Hoffa’s disease (Including Hoffa impingement syndrome and Hoffa ganglion cysts). Miscellaneous diseases including anterior meniscal tear and cartilage injury).
An improved understanding of AKP with an increased awareness of the common abnormalities and their appearance, particularly on MR imaging which is accurate, specific modality and allows for a more accurate diagnosis, also may facilitate improved treatment and pre-operative planning.
MRI also can help determine which patients with knee injuries require surgery. MR imaging is recognized as a standard procedure and has replaced diagnostic arthroscopy as the primary diagnostic modality for many knee pathologies.
In Conclusion, MRI is generally safe, accurate, and specific modality which has been proven to be the modality of choice in the diagnosis of different knee pathologies that cause anterior knee pain in different age groups. Also, it has a high specification in detecting the grades and types of some of these diseases.