These images are taken from other patients with silicosis.
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Emphysema Panacinar emphysema, shown here, may accompany silicosis. Find 3 free, unattached alveolar walls, a histologic correlate of emphysema. While the emphysema may be related to smoking, the more pronounced pericicatricial (scar) emphysema noted here around the central silicotic nodule may have been caused by dust-related inflammation.
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What does the presence of an artery adjacent to the silicotic nodule indicate about the location of the nodule? Answer
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Airway Narrowing Black pigment-laden histiocytes and silicotic nodules surround a distorted bronchiole. Note the lack of emphysema here. Find the bronchiole and the accompanying artery. Find two silicotic nodules.
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The artery signifies a centriacinar region. The accompanying bronchiole (not shown here) has probably been narrowed (if in another plane of section) or obliterated by the silicotic scarring.
