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Bronchoalveolar lavage fluid with macrophages containing PAS-positive granules. The cells from the patient 1 were stained with periodic acid-Schiff and examined with a light microscope using a 400× enlargement (a). Microscope preparations of filtered and washed cells in an agar/paraffin block obtained from the patient 1 were stained with periodic acid-Schiff and examined with a light microscope using a 400× enlargement (b)
