Constipation and abdominal pain

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Eiman Ghaffarpasand, M.D. [2]

Differential Diagnosis of Constipation and Abdominal Pain

Diseases History and Symptoms Physical Examination Laboratory Findings Other Findings Diagnostic study of choice
Electrolyts

[Ca, K, Mg]

Biochemical tests
GI symptoms Extra GI symptoms Abnormal gait Anal protruding mass DRE Deep tendon reflex FBS TSH
Dysphagia Abdominal pain Anal pain Rectal bleeding Weight loss Polyphagia, Polyuria, Polydipsia Dry skin Tremor
Irritable bowel syndrome (IBS) - + +/- - - - - - - - Normal Normal Normal Normal Normal
Diverticulosis - + - + - - - - - - Normal Normal Normal Normal Normal
Hirschsprung disease - + - + + - - - - - Blood tinged glove Normal Normal Normal Normal
Cystic fibrosis - + - - + - - - - - Normal Normal Normal Normal Normal
Lead poisoning - +++ - - - - - + - - Normal Normal Normal Normal Normal
Hypomagnesemia - + - - - - - + - - Normal ↓↓ Mg Normal Normal
  • Plasma Mg level
Hypocalcemia/Hypercalcemia - + - - - - - - - - Normal ↓Ca/Ca Normal Normal
  • Plasma Ca level
Hypokalemia - + - - - - - - +/- - Normal ↓K Normal Normal
  • Plasma K level