- Much less common than Bochdalek hernias
- Occurs in the anterior midline through the sternocostal hiatus of the diaphragm,
- 90% of cases occurring on the right side.
 Imaging Findings
 Plain films
- Features vary depending on the contents of the hernia.
- Most often the hernia contains omentum, liver, or colon.
Patient #1: Mass adjacent to heart seen on routine pre-employment chest x-ray