Olecranon aperture: an incidental finding
The olecranon aperture or the supratrochlear foramen is an aperture situated at the distal epyphysis of the humerus. This aperture is situated between the olecranon fossae and the coronoid fossae. These fossae are usually separated by a thin bony plate or membrane. The olecranon aperture is an anatomical variant said to be present in at least 20% of the population, with regional and ethnic differences. Much has been known regarding its prevalence, however, its origin is still in debate. The supratrochlear foramen is said to cause an increased elbow extension and has been associated with fractures in the region due to the lack of bony mass. It can also mimic an ostelytic lesion or bone degradation, and, as such, we aim to report a case in which the olecranon aperture was found accidentally during a radiological evaluation of a shoulder and ulnar lesion.
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