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Figure 3 :(a) Tracheomediastinal fistula was formed by complete destruction of the carina (C), and proximal parts of left (LB) and right (RB) bronchi. The right and left superior pulmonary veins (RSPV, LSPV) form the inferior relations of the thick leathery wall (W) of the cavity produced by necrotic lymph nodes. (b,c) Transmural infiltration of the bronchus by atypical cells (H and E, ×100) is seen. (d) Atypical cells surround a cartilaginous plate (H and E, ×250)

Figure 3 :(a) Tracheomediastinal fistula was formed by complete destruction of the carina (C), and proximal parts of left (LB) and right (RB) bronchi. The right and left superior pulmonary veins (RSPV, LSPV) form the inferior relations of the thick leathery wall (W) of the cavity produced by necrotic lymph nodes. (b,c) Transmural infiltration of the bronchus by atypical cells (H and E, ×100) is seen. (d) Atypical cells surround a cartilaginous plate (H and E, ×250)