paraesophageal

adjective

para·​esoph·​a·​ge·​al

variants or British para-oesophageal

-i-ˌsäf-ə-ˈjē-əl 

: adjacent to the esophagus

especially : relating to or being a hiatal hernia in which the connection between the esophagus and the stomach remains in its normal location but part or all of the stomach herniates through the hiatus into the thorax