主要消化道疾病与营养缺乏 Major gastrointestinal diseases and nutritional deficiencies Organ Site of Defects in Nutrient Disease Predominant Disease Digestion/Absorption Celiac sprue(脂肪痢) Duodenum and jejunum Fat absorption lactose hydrolysis Chronic pancreatitis(慢性 胰腺炎) EXocrine pancreas Fat digestion Surgical resection of ileum (回肠手术切除) Crohn disease of ileum(Bleum Cobalamin and bile acid absorption 肠 Crohn氏病) Primary lactase deficiency (原发性乳糖酶缺乏) Small intestine Lactose hydrolysis主要消化道疾病与营养缺乏 Major gastrointestinal diseases and nutritional deficiencies Disease Organ Site of Predominant Disease Defects in Nutrient Digestion/Absorption Celiac sprue（脂肪痢） Duodenum and jejunum Fat absorption, lactose hydrolysis Chronic pancreatitis（慢性 胰腺炎） Exocrine pancreas Fat digestion Surgical resection of ileum （回肠手术切除） Crohn disease of ileum（回 肠Crohn氏病） Ileum Cobalamin and bile acid absorption Primary lactase deficiency （原发性乳糖酶缺乏） Small intestine Lactose hydrolysis