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. 2001 Mar;158(3):1029–1038. doi: 10.1016/S0002-9440(10)64050-3

Figure 1.

Figure 1.

MGCs adjacent to deposits of AL amyloid in the tonsil (A–D) and AA amyloid in the thyroid (E–H) of two patients who had suffered from a plasmacytoma and rheumatoid arthritis, respectively. Cathepsin K was found in the cytoplasm of MGCs as well as within amyloid deposits (asterisks). H&E stain (A and E). Congo Red staining in polarized light (B and F). Immunostaining with anti-λ-light chain (C), anti-AA amyloid (G), and anti-cathepsin K (D and H); hematoxylin counterstain. Original magnifications: ×100 (A, B, D, and H), ×76 (C and E–G).