Uncoordinated muscle contractions in the oesophagus, which create intermittent swallowing problems and chest or upper abdominal pain. The spasm can be caused by reflux oesphagitis but usually occurs for no known reason. It is more frequently seen in women and in the elderly.
A barium swallow and endoscopy can be used to rule out a more grave condition, like cancer. Treatment is of any underlying reason.