Most common site of lymphangioima is-

Lymphangiomas are the benign lymphatic counterpa of hemangiomas. Simple (capillary) lymphangiomas are slightly elevated or sometimes pedunculated lesions up to 1 to 2 cm in diameter that occur predominantly in the head, neck, and axillary subcutaneous tissues. Cavernous lymphangiomas (cystic hygromas) typically are found in the neck or axilla of children, and more rarely in the retroperitoneum. (Robbins basic pathology,9th edition,pg no.359)