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Causes of abdominal distension

This is also a common complaint of patient, caused by the 
"5F" -Fat, flatus, fluid, faeces and fetus
Fat - Obesity
Flatus - Obstruction / ileus
Fluid - Ascites
Faeces - Constipation
Causes of abdominal distension 
Obesity - Fat deposition in intra-abdominal and abdominal wall.
  • Peritoneal disease
  • Portal HTN
  • Hypoalbuminemia
Intestinal obstruction
  • Gastric outlet
  • Small intestinal
  • Large intestinal
Marked organomegaly
  • Massive hepatomegaly
  • Massive splenomegaly
  • Hydronephrosis
Mass lesions 
  • Neuroblastoma
  • Wilm's tumor
  • Abdominal lymphadenopatfty - ТВ,
  • Lymphoma
  • Mesenteric cyst
  • Ovarian tumors
  • Uterus - in pregnancy
Feeling of fullness of abdomen without any of the above mentioned conditions is post- prandial fullness in dyspepsia, hepatobiliary disease etc.