What it means
The spleen sits under the left ribs. It filters the blood and helps fight infection. Radiologists usually measure its length: in most adults, more than about 12 to 13 cm is called enlarged, though tall people can have a larger spleen. It can grow when it is working harder, when blood backs up into it from the liver, or when cells or other material build up inside it.
When it matters
A slightly enlarged spleen found by chance is common and often has no clear cause. Larger or new enlargement leads doctors to look for one. Common reasons include viral infections such as mononucleosis, liver scarring with raised pressure, and blood conditions such as some types of anemia or lymphoma. A blood count and an exam are usual first steps. Your doctor may suggest avoiding contact sports for a while, as an enlarged spleen injures more easily.
Questions to ask your doctor
- How large is my spleen, and is it bigger than on earlier scans?
- Could it be linked to my liver, a recent infection or my blood count?
- Should I avoid contact sports or heavy lifting for now?
