Fig. 2.

A, B. H & E stain shows a pulmonary parenchyma with conserved architecture and the presence of rounded granulomas composed of epithelioid macrophages, giant multinucleated cells and scarce lymphoplasmacytic infiltrate. No central necrosis is identified, and no microorganisms are observed with BK, PAS, Mucicarmin and GMS special stains. C, D. Thoracic CT scan with a decrease in the infiltrates and the mosaic attenuation, presence of mediastinal lymph node enlargement in the low precarinal area.