A most common complication of sliding hernia is -

There are 4 types of a hiatal hernia Type I: Sliding hernia (most common type ~ 70 - 80%) Type II: Paraesophageal or rolling hernia Type III: Mixed Type IV: These hernias are distinguished by the presence of other abdominal viscera within the defect i.e. momentum, transverse colon. Type I or Sliding hiatal hernia This is characterized by upward dislocation of the cardio-esophageal junction into the posterior mediastinum. Type II or Rolling Paraesophageal a hernia The cardio-esophageal junction is undisplaced The whole or pa of stomach herniates into the thorax immediately adjacent and to the left of the undisplaced cardio-esophageal junction. Since the normally located gastroesophageal junction functions normally in most of these hernias, reflux is uncommon. <img style="box-sizing: border-box; border: 0px; veical-align: middle; max-width: 100%;" src=" /> ref - Srb's manual of surgery 5e p795