PMC2831017_01
(A) Posteroanterior (B) lateral radiographs of elbow showed degeneration of ulnohumerus and radiohumerus joint with radial head deformity and subluxcation and avulsed bone around the lateral epicondyle.
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F1
Plain radiographs showed arthrosis of the elbow joint with the radiohumeral joint more sever than ulnohumeral joint, radial head deformity including lost normal concave shape and hypertrophic marginal osteophyte with lateral subluxation and some chip bone or ectopic bone over lateral epicondyle (Fig. 1).
Fluroscan of elbow without and with lateral stress (provocative stress applied) showed subluxed radial head posterior to the midline of the capitellum.
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F2
After general anesthesia, the lateral pivot shift test by O'Driscoll's method with the patient's arm overhead was positive and the elbow stress test at fluoroscan revealed negative valgus and varus stress test and positive lateral stress test, which the radiograph is taken with provocative stress applied during the lateral pivot shift test (Fig. 2).
(A)Posteroanterior (B) lateral radiographs of elbow 2 years after operation showed anchor suture and bone screw at lateral epicondyle and incompletely reattached avulsed bone.
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F3
Post-operative plain radiographs showed the deformed radial head still subluxation at anterior-posterior view but no progressing arthrosis of the elbow joint(Fig. 3).