In some rare studies evaluating the accuracy of US, results have shown a sensitivity ranging from 89% to 100% and a specificity ranging from 95% to 98% for US detecting chest wall invasion by lung cancer. However those studies got criticized. Bandi et al study, got criticized by the fact that the operators in the study were experienced interventional pulmonologists who perform hundreds of thoracic and endoscopic ultrasound per year. Nobuo et al study took place in 1993, since when the device of US has evolved, the investigators can not apply with certainty the findings of this study.