Radial drainage patterns develop surrounding areas of high topography where elevation drops from a central high area to surrounding low areas. Rectangular drainage patterns develop where linear zones of weakness, such as joints or faults cause the streams to cut down along the weak areas in the rock.
Surgery to remove some or most of the esophagus is called an esophagectomy. Often a small part of the stomach is removed as well. The upper part of the esophagus is then connected to the remaining part of the stomach.Part of the stomach is pulled up into the chest or neck to become the new esophagus.pen esophagectomy: Many different approaches can be used to remove part of the esophagus. 1  For a transthoracic esophagectomy, the esophagus is removed with the main incisions in the abdomen and the chest. 2  If the main incisions are in the abdomen and neck, it is called a transhiatal esophagectomy.
Paraesophageal Hernias. Paraesophageal hernias are one type of large hiatal hernia and occur when the stomach slides up beside the esophagus (see diagram below). In these situations, the stomach may twist and lose its blood supply or obstruct. Symptoms of paraesophageal hernias often include bloating and chest pain.