[Mediastinal pathology: pathological treatment of frozen section].

Tumoral pathology of the mediastinum is extremely varied, with different prognoses and treatments. The pathological examination is essential, both etiologically and prognostically. Mediastinoscopy is generally used to check for lymph node metastases, bronchopulmonary carcinoma, but also, to a lesser degree, for the exploration of isolated mediastinal adenopathy. Finally, this technique enables a diagnostic approach to mediastinal tumours. The frozen section has its place, at the first indication, making it possible to prescribe neoadjuvant chemotherapy, and in the other situations to make sure that the quantity of material removed is sufficient or even to carry out complementary techniques.