Lymphangiomas are benign tumors that arise from the lymphatic system, which is part of the body's immune system. These growths are typically composed of lymphatic vessels and can occur anywhere in the body, but are most commonly found in the neck, armpits, and groin. They often appear as soft, spongy masses and can vary in size. These tumors are usually present at birth or develop in early childhood. While lymphangiomas are not cancerous, they can cause complications depending on their size and location, potentially leading to discomfort or obstruction of nearby structures. Treatment options may include observation, surgical removal, or other interventions if necessary.