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Lactose Intolerance

 Syn. Intestinal lactase deficiency , lactose malabsorption , lactase deficiency

Signs & Symptoms

 Cramping in periumbilical area
Ref: Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Explosive diarrhea
Ref: Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Frothy diarrhea
Ref: Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Joint stiffness
Ref: Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]

Physical Examination

 Bloating
Ref: Uptodate [ Lactose intolerance] Harrison [ 257] Cecil [ 387] Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Abdominal tenderness
Ref: Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Borborygmi sounds
Ref: Uptodate [ Lactose intolerance] Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]

Lab / Serology

 Bulky stool
Ref: Uptodate [ Lactose intolerance] Epocrates [ https://online.epocrates.com/diseases/79831/Lactase-deficiency/Diagnostic-Approach]
Frothy stool
Ref: Uptodate [ Lactose intolerance]
Watery stool
Ref: Uptodate [ Lactose intolerance]

Imagin Study

Complication

Risk Factors

 Irritable bowel syndrome
Ref: Epocrates [ https://online.epocrates.com/diseases/79832/Lactase-deficiency/Risk-Factors]
Enteritis
Ref: Epocrates [ https://online.epocrates.com/diseases/79832/Lactase-deficiency/Risk-Factors]
Family lactase deficiency
Ref: Epocrates [ https://online.epocrates.com/diseases/79832/Lactase-deficiency/Risk-Factors]

Cause

Other