Citation, DOI & article data
An olecranon foramen, also known as septal aperture or supratrochlear foramen, is a common normal anatomical variant of the distal humerus.
There is a wide variation of incidence, occurring between 5% to 50% of the population depending on ethnicity, being more common in individuals of African descent than Caucasians, and is most often bilateral 1,2.
The olecranon foramen is an aperture formed by the failure of ossification of the septum that separates the coronoid and olecranon fossae.
- presence may put patients at increased risk of distal humerus fractures 3
- 1. Koyun N, Aydinlioğlu A, Gümrukcüoğlu FN. Aperture in coronoid-olecranon septum: A radiological evaluation. Indian J Orthop. 2011;45 (5): 392-5. doi:10.4103/0019-5413.83945 - Free text at pubmed - Pubmed citation
- 2. Ndou R, Smith P, Gemell R et-al. The supratrochlear foramen of the humerus in a South African dry bone sample. Clin Anat. 2012; . doi:10.1002/ca.22132 - Pubmed citation
- 3. Sahajpal DT, Pichora D. Septal aperture: an anatomic variant predisposing to bilateral low-energy fractures of the distal humerus. Can J Surg. 2006;49 (5): 363-4. Free text at pubmed - Pubmed citation