Table 1.

Causes of malabsorption

Autoimmune GSE Autoimmune enteropathy	Hypersensitivity Protein allergy (milk and soy) Eosinophilic gastroenteritis
Inherited/metabolic MVID Abetalipoproteinemia Primary lymphangiectasia Chronic granulomatous disease	Nutritional deficiencies B12/folate deficiency Zinc deficiency Protein–calorie deficiency
Immune disorders GVHD AIDS and congenital immune deficiencies	Neoplastic/infiltrative diseases Waldenström's macroglobulinemia Amyloidosis Lymphoma
Infections Tropical sprue Whipple's disease Bacterial overgrowth Giardiasis H. pylori – duodenitis	Systemic diseases Lipid storage disease Histiocytosis X Inflammatory bowel diseases Crohn's disease Ulcerative colitis