Determining anatomical localisations of cervical oesophagus, hiatal clamp and oesophagogastric junction with oesophagogastroduodenoscopy.

Knowing these anatomical localisations may be important in predicting complications that may occur in this region in EGD and planning the precautions to be taken. We also believe that it will guide clinicians in determining hiatal hernia and related deficiencies.