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The article presents a case study on the chemical colitis caused by some chemicals found in disinfectants. It states that the hydrogen peroxide which was formed when the peracetic acid dissolves in water may cause chemical colitis based on the study of S. Morini and colleagues. Also mentioned that acute colitis may be developed after using of disinfectants which contain peracetic acid based on the study of T. Coton and colleagues.

The article presents a case study of a patient with esophageal intramural pseudodiverticulosis (EIPD) which appeared to be related to achalasia. Topics discussed include the patient's progressive dysphagia, results of barium esophagogram, upper endoscopy and esophagel manometry, and treatment of the achalasia through the injection of botulinum toxin type A.

The article presents a case study of a patient with recurrent acute pancreatitis which was due to a large Peutz-Jeghers-type hamartomatous polyp. Topics discussed include the symptoms of the patient, the results of abdominal ultrasonography, computed tomography (CT) and endoscopic retrograde cholangiopancreatography (ERCP), and polypectomy performed on the patient.

The article describes the case of a 63-year-old man who suffered massive upper gastrointestinal bleeding caused by Dieulafoy's lesion within a giant midesophageal diverticulum.