PMC60654_01
Chest radiograph. Parenchymal density in the right upper lobe.
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F1
Three weeks later, at a control chest x-ray, middle lobe was normal while a parenchymal density in the upper right lobe appeared (Figure 1).
Bronchial biopsy. Photomicrograph (x 400) of bronchial mucosa showing remarkable basement membrane thickening (asterisks) and mild-moderate submucosal chronic inflammatory infiltrate (i). The epithelium is normal.
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F2
Multiple bronchial biopsies showed evident thickening of basal membrane, angiectasies and active chronic inflammation of the tonaca propria (Figure 2).
Chest radiograph. Lung density in the left lower lobe.
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F3
A further episode of radiological lung density in the left lower lobe occurred two months later (Figure 3).