Foreign Bodies Simulating Mesenchymal Tumors: Laparo-Endoscopic Resolution in Abdomen and Mediastinum

The cases demonstrate that retained surgical items are preventable "never events" with significant clinical, ethical, and legal consequences. They often present with nonspecific symptoms and delayed diagnosis, requiring reoperation. Despite standard precautions, human and procedural factors persist, emphasizing the need for improved surgical safety culture, advanced prevention strategies, and meticulous reintervention techniques.