Pancreatic pseudocyst as a cause for secondary achalasia.

Secondary achalasia is commonly due to cancer. Benign causes are rare and an association with pancreatitis has never been made. Our patient presented with clinical, manometric, endoscopic, and radiographic features of achalasia that occurred in conjunction with a pancreatic pseudocyst extending into the mediastinum. Documentation of this unique relationship was made on two occasions after episodes of complicated pancreatitis and was confirmed by restoration of normal esophageal function after drainage of the pseudocyst. Onset of dysphagia occurring in association with pancreatitis suggests the presence of a pseudocyst and secondary achalasia.