A 58-year-old man with a 40-pack-year smoking history presents with progressive dyspnea and a dry cough. Chest CT reveals bilateral pleural plaques and a right pleural mass. A pleural lesion biopsy is performed. The photomicrograph shows elongated, beaded golden-brown structures within macrophages, surrounded by a fibrous stroma with atypical mesothelial cells forming tubular and papillary patterns. Which of the following best describes the structures characteristic of asbestos exposure identified in this biopsy?

Liver pathology (hepatitis, cirrhosis)
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Gallbladder and biliary tract disorders
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Pancreatic diseases
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Kidney diseases
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Male reproductive pathology
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Female reproductive pathology
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Breast pathology
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Endocrine pathology
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Bone and joint pathology
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Skeletal muscle diseases
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Peripheral nerve disorders
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Soft tissue tumors
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Head and neck pathology
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