Lymphatic malformation is a condition where the lymphatic system, which helps remove excess fluid from tissues, develops abnormally. This can lead to the formation of fluid-filled cysts or masses, often appearing in areas like the neck, armpits, or groin. These malformations can vary in size and may cause swelling or discomfort. The exact cause of lymphatic malformations is not fully understood, but they are believed to occur during fetal development. Treatment options may include observation, sclerotherapy, or surgery, depending on the severity and symptoms. Early diagnosis and management can help improve outcomes for affected individuals.