Figure 3From: Lessons from Mycobacterium avium complex-associated pneumonitis: a case report Immunohistochemical staining for tumor necrosis factor-α in lung tissue biopsy. (a) Anti-tumor necrosis factor-α immunostaining (brown), 200× magnification. (b) Isotype control antibody immunostaining (negative control) for anti-tumor necrosis factor-α, 200× magnification.Back to article page