Mediastinal lymphadenopathy often accompanies the course of severe specific forms of pulmonary parenchyma of inflammatory genesis, among which the most common pathology is tuberculous lesion.

Thus, the presence of a dense lymph node or a lymphatic conglomerate of a high density, immobile upon palpation, indicates a development of the neoplastic process or the presence of a specific inflammation (tuberculous lesion).

However, when a tuberculous lesion has been found in the lymph nodes of only one organ or part of the carcase, only the affected organ or part of the carcase and the associated lymph nodes need be declared unfit for human consumption.