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Clinical Challenge
October 17, 2019

A Posterior Neck Mass in a 7-Month-Old Infant

Author Affiliations
  • 1Tufts University School of Medicine, Boston, Massachusetts
  • 2Department of Otolaryngology–Head & Neck Surgery, Tufts Medical Center, Boston, Massachusetts
  • 3Division of Pediatric Otolaryngology and Facial Plastic Surgery, Floating Hospital for Children at Tufts Medical Center, Boston, Massachusetts
JAMA Otolaryngol Head Neck Surg. 2020;146(1):69-70. doi:10.1001/jamaoto.2019.2861

A full-term, 7-month-old male infant presented to an outpatient pediatric otolaryngology clinic with a firm, irregularly shaped posterior neck mass. He had been diagnosed prenatally with cerebellar hypoplasia, so a magnetic resonance imaging study of the brain was performed at 1 month of age. This study demonstrated an incidental solid, homogenous mass in the subcutaneous fat of the right occiput with irregular borders and infiltration into the paraspinal musculature (Figure, A). On examination, the upper posterior neck mass was deep to palpation without overlying skin changes. The patient had no discomfort, and neck movement was not restricted.

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