Lactose Intolerance

The condition resulting from the absence or deficiency of LACTASE in the MUCOSA cells of the GASTROINTESTINAL TRACT, and the inability to break down LACTOSE in milk for ABSORPTION. Bacterial fermentation of the unabsorbed lactose leads to symptoms that range from a mild indigestion (DYSPEPSIA) to severe DIARRHEA. Lactose intolerance may be an inborn error or acquired.

Also Known As:

Intolerance, Lactose; Malabsorption, Lactose; Alactasia; Dairy Product Intolerance; Hypolactasia; Milk Sugar Intolerance; Lactose Malabsorption

Digestive System Diseases: 1042
- Gastrointestinal Diseases: 5874
  - Intestinal Diseases: 1601
    - Malabsorption Syndromes: 639
      - Lactose Intolerance: 1232
Congenital, Hereditary, and Neonatal Diseases and Abnormalities: 933
- Inborn Genetic Diseases: 11939
  - Inborn Errors Metabolism: 1162
    - Inborn Errors Carbohydrate Metabolism
      - Lactose Intolerance: 1232
Nutritional and Metabolic Diseases: 15
- Metabolic Diseases: 10142
  - Inborn Errors Metabolism: 1162
    - Inborn Errors Carbohydrate Metabolism
      - Lactose Intolerance: 1232
  - Malabsorption Syndromes: 639
    - Lactose Intolerance: 1232

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