Splenomegaly is a medical term that refers to the enlargement of the spleen, an organ located in the upper left side of the abdomen. The spleen plays a crucial role in filtering blood and supporting the immune system. When it becomes enlarged, it can indicate various underlying health issues, such as infections, liver diseases, or blood disorders. Symptoms of splenomegaly may include pain or discomfort in the abdomen, a feeling of fullness, or anemia. Diagnosis typically involves physical examinations, imaging tests like ultrasound, and blood tests to determine the cause of the enlargement. Treatment depends on the underlying condition affecting the spleen.