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Abstract
This study includes 50 patients complaining from elbow joint lesions. Plain radiography, CT and MR imaging were done for all patients included in this study. Traumatic lesions were the most common pathological entity in our study; ten patients were suffering from simple osseous fractures. Both plain radiography and CT showed the fracture line, CT was superior in detection of intra-articular bony fragments in old non-union fractures. MRI detects bone marrow edema in six cases, intra-articular hematoma in one case and joint effusion in one case, which could not be seen in both plain radiography and CT.
Six cases showed post traumatic soft tissue lesions. Plain radiography and CT detect soft tissue calcification in one case, obliteration of the fat pad sign in one case (appeared by plain radiography), and small soft tissue swelling in posterior region of the elbow in one case. MRI was superior to Plain radiography and CT in evaluation of the soft tissue. It showed LCL tear in two cases, MCL tear in one case, one case of ulnar nerve neuropathy, one case of olecranon bursitis and one case showed muscle strain with hemorrhagic effusion.
Two cases showed complex osseous and soft tissue lesions. MRI was superior to plain radiography and CT in detection of LCL tear and presence of joint effusion.
Six cases showed non traumatic soft tissue lesions. MRI showed tendon and ligaments injuries which could not be seen in both plain radiography and CT. plain radiography and CT only showed soft tissue calcification in three cases.
In nine case of osteoarthritis MR imaging was superior to plain radiography in detection of articular cartilage loss in advanced (two) cases, intra-articular loose bodies in two cases, and joint effusion in three cases. CT also showed the intra-articular loose bodies.