Table 4.

 Causes of abnormal results for faecal calprotectin other than inflammatory bowel disease

Condition	References
Infections:
Giardia lamblia	100
Bacterial dysentery	15;30;35;76;78;87;93;100
Viral gastroenteritis	35;101
Helicobacter pylori gastritis	24
Malignancies:
Colorectal cancer	8;25;28-30;44;82;102
Gastric carcinoma	44
Intestinal lymphoma	28
Drugs:
Non-steroidal anti-inflammatory drugs	76;82;100;103
Proton pump inhibitors	104
Food allergy (untreated)	14;18;27;76
Other gastrointestinal diseases:
Gastro-oesophageal reflux disease	24;78
Cystic fibrosis	87;105
Coeliac disease (untreated)	27;76;78;82;100
Diverticular disease	18;25;27;29;44;100
Protein losing enteropathy	76
Colorectal adenoma	18;25;29;30
Juvenile polyp	16;17;87
Autoimmune enteropathy	99
Microscopic colitis	18;25;106
Liver cirrhosis	107
Young age (<5 years)	47;91;108