[Complex morphological diagnostics of tuberculosis and sarcoidosis of the lungs].

Differential diagnosis of disseminated lung diseases, particularly tuberculosis and sarcoidosis, presents certain difficulties for clinicians. In the verification of the diagnosis a decisive role belongs to the morphological study, for which the most commonly used material is transbronchial biopsy. Diagnostic signs of active disseminated pulmonary tuberculosis are presence of different-sized granulomas with signs merger, necrosis, infiltration of polymorphonuclear leukocytes, weakly expressed fibrillogenesis. Cytological markers of a specific process are young biosinteziruyuschie macrophages and acid-fast bacilli. The diagnostic features of pulmonary sarcoidosis are monomorphic granulomas with no tendency to merge and necrotisation expressed fibrosis and hyalinization processes. Cytological marker for the disease is the high content of epithelioid cells with signs of secretion.