Figure 5From: Lung tumor promotion by chromium-containing welding particulate matter in a mouse model Photomicrographs of lung tissue from MCA-treated mice. Representative photomicrographs were captured at 30 weeks after MCA-initiation and show presence of lymphoid infiltrates (i.e., inflammatory cell infiltrates consisting of peribronchial/perivascular associated lymphocytes, macrophages, and plasma cells) and welding PM (arrows) in the MCA/low GMA-SS group (left panel). An area of malignant transformation (rectangle)—larger cells with irregular nuclei and associations—in the MCA/high GMA-SS group (right panel).Back to article page