II. Causes: Gastrointestinal

III. Causes Spleen

  1. Splenomegaly (e.g. Mononucleosis)
  2. Splenic Rupture
  3. Splenic infarction
  4. Splenic vein thrombosis

IV. Causes: Genitourinary

V. Causes: Cardiopulmonary

  1. Myocardial Ischemia or infarction
  2. Pneumonia
  3. Empyema

VI. Imaging: Preferred

  1. Non-contrast Abdominal CT

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