Posterior marking on Ba column in Ba swallow study is caused by?
C i.e. Aberrant right subclan aery An aberrant right subclan aery arises from the aoic arch distal to the origin of left subclan aery, and passes upwards & to the right behind the oesophagus. This gives rise to a classical smooth, oblique indentation on posterior wall of barium filled oesophagusQ.
Aoic knuckle
Left atrium
Aberrant right subclan aery
Pulmonary aery sling