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| | Indication | Key Technical Pearls (Malawer) | |---------------|----------------|------------------------------------| | En bloc wide resection | Most high‑grade sarcomas | – Use “wide” margins measured on MRI; – Include a cuff of healthy tissue; – Preserve uninvolved neurovascular bundles when possible. | | Compartmental resection | Tumors confined to a known anatomic compartment (e.g., femoral shaft) | – Remove the entire compartment; – Ligate and resect the associated periosteum. | | Extra‑compartmental (trans‑compartmental) resection | Tumors breaching compartment boundaries | – Extend resection across the breached plane; – May require vascular reconstruction. | | Marginal resection | Low‑grade lesions where limb function is paramount | – Accepts a microscopically positive margin in selected cases; – Often combined with adjuvant radiotherapy. | | Amputation | Unresectable neurovascular involvement, massive bone loss, or patient preference | – Level dictated by tumor extent; – Preserve as much limb length as feasible (e.g., through‑knee vs. transfemoral). |

The patient was Maya, a twelve-year-old violinist. In a previous decade, the diagnosis would have meant a high-level amputation—a life defined by absence. But Elias was a student of the Malawer techniques. He wasn't just removing a malignancy; he was performing a rescue mission. He followed the planes described in the text, carefully isolating the radial nerve, a silver thread that held the key to Maya’s future music.