Reconstruction of Complex Anterior Chest Wall Defects: The Lasagna Technique.

Background: Sternal tumors are rare, comprising only 0.94% of all bone tumors, with the majority being sarcomas. An extensive composite defect is often the result of surgical resection. Reconstruction of this anatomical area is a challenge for plastic surgeons. Reconstruction must fulfil two different tasks: restoration of soft tissues and stabilization of the chest wall. Both are well defined, and many techniques have been historically proposed. Methods: We present the case of a 66-year-old man affected by sternal metastasis of lung non-small cell carcinoma with sarcomatoid features. After wide tumor resection, a large defect was created. Results: The patient underwent a complex multilayer reconstruction that combined multiple techniques: Gore DualMesh to reconstruct the pericardial plane and protect the heart muscle, omental flap to facilitate integration of the mesh, titanium bars to recreate chest wall stability, and bilateral pectoralis muscle flaps to cover hardware. This multilayer reconstruction was named the "lasagna technique." Conclusions: Due to the rarity of primary malignancies of the sternum, it is difficult to standardize a therapeutic approach. For this reason, it is necessary to customize the surgical treatment by combining several techniques and materials. Our lasagna technique may be considered a valuable option in treating these complex reconstructive cases.