Surgical treatment of retrosternal extraosseous Ewing Sarcoma in a 6-years old female: A clamshell approach with hemysternectomy and application of a non-crosslinked extracellular matrix

the clamshell approach is therefore useful to achieve the retrosternal space and the lung with a single surgical access. According to our experience, we consider appropriate to use a non-crosslinked matrix for sternal reconstruction.