the maturing olecranon of the ulna is readily prone to misinterpretation because its normal radiographic characteristics may closely resemble those of fractures , for the following reasons : ( 1 ) just prior to ossification of the olecranon epiphysis , a straight sclerotic edge develops in the associated metaphysis on the proximal part of the ulna ;
C0223710
olecranon
C0041600
ulna