CENTRE JEAN PERRIN / ISM / SCIENCE PHOTO LIBRARY CENTRE JEAN PERRIN / ISM / SCIENCE PHOTO LIBRARY
Splenomegaly. Composite image of a computed tomography (CT) scan and a positron emission tomography (PET) scan of the thorax and abdomen of a patient with splenomegaly, or an enlarged spleen (orange at right). The spleen acts as a filter for the blood. Splenomegaly is a symptom of a variety of diseases. It can be caused by lymphoma, bacterial infection, liver disease, or malaria. Treatment is of the underlying cause. If the splenomegaly cannot be reversed or the organ becomes too damaged, treatment is by surgical removal of the spleen (splenectomy).
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