[Extemporaneous examination in lung pathology: the pathologist's view].

Extemporaneous examination of a thoracopulmonary lesion has an unquestionable interest when pre-surgical diagnostic workup has not allowed determining its exact nature. This examination, the sole objective of which is to guide the surgical approach, is especially important in lung pathology, due to the limited non-surgical access to thoracic lesions and the morbidity and mortality of repeated surgery. Its yield as a decision-making procedure is of utmost importance in many clinical situations, and a close collaboration between thoracic surgeons and pathologists is required to ensure its quality, in a context of mutual confidence that requires time and experience.