Presentation and evaluation of an atypical, supraclavicular mass in a pediatric patient.

Although the vast majority of pediatric neck masses are benign, pediatric malignancies commonly present in the supraclavicular region. We present the case of a 4-year-old male who presented with a mass in the trapezius muscle with accompanying lymphadenopathy. An extensive work-up was performed to exclude malignancy, and the patient was ultimately diagnosed with a benign monocytic mass, which surgically excised. He has been doing well since surgery with no evidence of recurrence. A review of the literature revealed this case to be the first of its kind to be reported.