Tuberculosis. Seen here are tuberculous granulomas. Image A is an early granuloma with lymphocytes, epithelioid cells and fibroblasts organizing around a central focus. The multinucleate giant cell in the center is typical of granulomas, but is not excusive to tuberculosis. Image B shows multiple granulomas surrounding and invading a vein near the lung hilum. Central degeneration is starting to appear and will eventually become the caseous necrosis characteristic of tuberculosis.
Tuberculosis. Seen here are tuberculous granulomas. Image A is an early granuloma with lymphocytes, epithelioid cells and fibroblasts organizing around a central focus. The multinucleate giant cell in the center is typical of granulomas, but is not excusive to tuberculosis. Image B shows multiple granulomas surrounding and invading a vein near the lung hilum. Central degeneration is starting to appear and will eventually become the caseous necrosis characteristic of tuberculosis.
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