Capillary lymphangiomas Capillary lymphangiomas are composed of small, capillary-sized lymphatic vessels and are characteristically located in the epidermis. Cavernous lymphangiomas Composed of dilated lymphatic channels, cavernous lymphangiomas characteristically invade surrounding tissues. Cystic hygromas Cystic hygromas are large, macrocystic lymphangiomas filled with straw-colored, protein-rich fluid.