Acute cholecystitis is a common serious complication of gallstones. The reported mortality of acute cholecystitis is approximately 3%, but the rate increases with age or comorbidity of the patient. If appropriate treatment is delayed, complications can develop as a consequence with a grave prognosis. The current standard of care in acute cholecystitis is an early laparoscopic cholecystectomy with the appropriate administration of fluid, electrolyte, and antibiotics. On the other hand, the severity of the disease and patient's operational risk must be considered. In those with high operational risks, gall bladder drainage can be performed as an alternative. Currently percutaneous and endoscopic drainage are available and show clinical success in most cases. After recovering from acute cholecystitis, the patients who have undergone drainage should be considered for cholecystectomy as a definitive treatment. However, in elderly patients or patients with significant comorbidity, operational risks may still be high, making cholecystectomy inappropriate. In these patients, gallstone removal using the percutaneous tract or endoscopy may be considered.

Fecal microbiota transplantation (FMT) is a highly efficacious and safe modality for the treatment of recurrent or refractory Clostridioides difficile infection (CDI), with overall success rates of 90%. Thus, FMT has been widely used for 10 years. The incidence and clinical characteristics of CDI, the main indication for FMT, differ between countries. To date, several guidelines have been published. However, most of them were published in Western countries and therefore cannot represent the Korean national healthcare systems. One of the barriers to performing FMT is a lack of national guidelines. Accordingly, multidisciplinary experts in this field have developed practical guidelines for FMT. The purpose of these guidelines is to aid physicians performing FMT, which can be adapted to treat CDI and other conditions.

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