An enlarged spleen, also known as splenomegaly, occurs when the spleen becomes larger than its normal size. The spleen is an organ located in the upper left side of the abdomen and plays a crucial role in filtering blood and supporting the immune system. Various conditions, such as infections, liver disease, or blood disorders, can lead to an enlarged spleen. Symptoms of an enlarged spleen may include discomfort or pain in the abdomen, a feeling of fullness, or anemia. Diagnosis typically involves physical examination, imaging tests like ultrasound, and blood tests. Treatment depends on the underlying cause and may involve medication or, in severe cases, surgery.