A 22-day-old male neonate who was born full term to a primiparous mother presented with a rapidly enlarging swelling in the left side of his neck. He had been evaluated by his pediatrician at day of life 17 and was found to have a soft left-sided neck mass. An ultrasonogram obtained on day of life 20 demonstrated a cystic-appearing mass in the left side of the neck. Physical examination revealed a well-developed, well-nourished neonate who was not in any acute distress and was otherwise in good health. He had no stridor and was feeding comfortably. The mass, which was 5 to 6 cm in diameter, was soft, without tenderness to palpation. There was no evidence of overlying erythema or edema. The results of the rest of the examination, including an intraoral examination and fiberoptic laryngoscopy, were normal.
Thomas T, Sdrulla D, Jeyakumar A. Radiology Quiz Case 2. Arch Otolaryngol Head Neck Surg. 2011;137(2):194–197. doi:10.1001/archoto.2011.5-a
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