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Pathological Case of the Month

Jeanne Ackerman, MD; Van Chau, MD; Enid Gilbert-Barness, MD
Arch Pediatr Adolesc Med. 1996;150(10):1101-1102. doi:10.1001/archpedi.1996.02170350103020.
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A 15-DAY-OLD, previously healthy boy presented to the emergency department with a right lateral neck mass. The mass was first noticed by his mother during bathing on the day of admission. The infant was born at full term in vertex position by an uncomplicated vaginal delivery to a 20-year-old gravida 3 woman. The boy had normal newborn examination results and was discharged after 2 days. Physical examination in the emergency department revealed a 2×3-cm, firm, wellcircumscribed, mobile, nontender, nonerythematous mass in the right lateral neck. The neck was supple, with full range of motion and without cervical adenopathy. Bilateral otitis media was also present. A magnetic resonance imaging scan showed a 2×2×5-cm, hypovascular, ill-defined mass lying medial to the sternocleidomastoid, displacing the great vessels medially and with deviation of the air column to the left (Figure 1). The child developed positional stridor 4 days later. The mass was surgically removed


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