Axial, sagittal-reformatted and 3D CT images of the sternum shows a small round defect in the lower third of the sternum (arrows)
Facts: Sternal Foramen
- Small round/oval defect in the lower third of the sternum
- Incomplete fusion of multiple ossification centers
- Usually asymptomatic and of no clinical significance
- Prevalence 6.7% in autopsy population
Imaging
- Mostly incidentally found on chest CT
- Usually solitary
- Mostly in the body of the sternum. Rare in the manubrium
Reference:
Yekeler E, et al. Frequency of sternal variations and anomalies evaluated by MDCT. AJR 2006;186:956-960
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