This patient is a 9-month-old with a macrocystic lymphatic malformation (LM) of the left neck. LMs, the second most common type of head and neck vascular malformation, are composed of dilated, abnormal lymphatic vessels thought to occur due to abnormal development of the lymphatic system. A complete resection was performed, and LM was confirmed by pathology. Soft tissue dissection was performed immediately adjacent to the mass to reflect tissue off the fluid-filled lesion. Neurovascular structures were preserved in this process.