PMC3891388_01
The plain chest radiograph displays a relatively well-defined solitary mass in the left lower lobe.
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F1
The plain chest radiograph and CT scan revealed a relatively well-defined soft mass in the left lower lobe of the lung (Figure 1).
Microscopic findings of inflammatory pseudotumor. The alveolar architecture is obliterated. The spindle cells are arrayed in a storiform pattern, and interspersed with many inflammatory cells with small lymphoid follicles (H & E, x40) (A). The picture shows a mixture of spindled fibroblasts, myofibroblasts, and inflammatory cells, primarily plasma cells, lymphocytes, and occasional eosinophils. No nuclear atypia or mitotic figures are evident (H & E, x400) (B).
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F2
Lymphoid follicles were also occasionally seen (Figure 2).
The plain chest radiograph (A) and chest CT scan (B) show bilateral, ill-defined consolidative lesions.
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F3
The other lesions were about 3.5 cm in size, and they were located in the lingular division of the left upper lobe; these exhibited an appearance similar to that of the lesion in the right upper lobe (Figure 3).
Microscopic findings of the transbronchial lung biopsy. It also shows the massive infiltration of inflammatory cells, such as plasma cells, lymphocytes, and neutrophils, admixed with fibroblasts and myofibroblasts. These findings are similar to those of the previous mass (H & E, x400)
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F4
These findings were similar to those from the previous mass (Figure 4).