Introduction

Lung:

Haematoxylin & Eosin (x100)

The lung lesions consisted of a core of amorphous proteinaceous material (P), which in some cases had become mineralised. Around the core there was a ring of enlarged activated macrophages with foamy cytoplasm. Some macrophages showed signs of epithelioid cell formation and a small number of Langerhans' giant cells are also present. Around the macrophages are scattered lymphocytes and plasma cells. Fibrous capsules surround almost all lesions.

Cases

Review Questions

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