<unk> s have an incidence of 1 in 100,000.<unk> s make up 6-7% of all mediastinal masses. They can present at any age, but are most commonly diagnosed between the third and fifth decade of life. Females and males have approximately equal incidences of<unk> s.
Pericardial cyst
Cardiac myxoma
Annuloaortic ectasia
Crisscross heart
Overriding aorta
Cardiac fibroma
Pulmonary artery sling
Aortoesophageal fistula