Ewing sarcoma of the clavicle: a case report.

The aim of this case study is to demonstrate an unusual location of Ewing Sarcoma and promote awareness of the effects of patient care regarding delay in diagnosis. A 23-year-old male presented with a painless soft tissue mass over the left clavicle of two months. Initial radiographs of the clavicle were reported negative. Approximately one year later the patient stated the mass had become painful and increased in size. Repeat radiographs demonstrated permeative destruction within the left clavicle with adjacent soft tissue mass. Follow up imaging of CT, MRI, and PET-CT characterized the lesion and demonstrated metastatic disease. Subsequent biopsy confirmed a diagnosis of primary Ewing sarcoma. The patient was referred for oncologic management including chemotherapy and radiation with initial remission post treatment. Unfortunately, the tumor recurred two years later. Timely diagnosis, appropriate management and referral of patients with suspicious presentation is critical to future outcomes.