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A Case of Sub-Diaphragmatic Abscess after Injection of Botulinum Toxin to Treat Achalasia.
Achalasia is a disorder of the esophagus characterized by decreased lower esophageal sphincter (LES) relaxation and absence of esophageal peristalsis. Botulinum toxin (BT) injection targeting the LES has been used in the treatment of achala…