Achalasia is primarily caused by the degeneration of the myenteric plexus in the esophageal wall, leading to impaired ...

The optimal management of achalasia is controversial and there is a paucity of high-quality evidence from randomized trials comparing the effectiveness of different treatments and interventions.

Scientists have pieced together the skull of a strange ancient bird, revealing a primitive beak lined with teeth. The "transitional" bird sheds light on a pivotal point in the pathway from ...

The figures are stills from the linked videos. a; Classical achalasia, showing a dilated esophageal body bird beak-like narrowing of lower esophageal sphincter (see Video 1). b; Vigorous achalasia ...