Table 1.

Causes of ileostomy diarrhea

Context	Causes
Failure to adapt	Extensive ileal resection Overlap with short bowel syndrome Proximal/unresected inflammatory bowel disease Enteric fistula Perioperative adrenal insufficiency Idiopathic failure of adaptation
Postadaptation	Infectious Clostridioides difficile enteritis Bacterial, viral, protozoal, fungal Small intestinal bacterial overgrowth Medications Structural Stomal dysfunction/stricture Intestinal obstruction Enteric fistula Ileus Lymphoma/lymphatic obstruction Autoimmune Recurrent inflammatory bowel disease Postcolectomy ulcerative colitis–associated enteritis Autoimmune/other enteropathy Endocrine Secretory tumors  VIPoma, gastrinoma, carcinoid Hyperthyroidism Adrenal insufficiency Bile acid deficiency Osmotic diarrhea Radiation enteritis Pancreatic insufficiency Factitious disorders