Lymphangioma

• Uncommon congenital malformation of the lymphatic system; either superficial (lymphangioma circumscriptum) or deep-seated (cavernous lymphangioma)
• Lymphangioma circumscriptum: multiple translucent vesicles with clear lymph fluid (resembling frog spawn)
• Cystic hygroma (variant of cavernous lymphangioma): deep-seated large translucent soft mass typically over neck, axilla, or lateral chest