Table 4.

Immunofluorescence findings in 13 AL cases that showed positive staining for >1 immunoglobulin light and/or heavy chain

Case No.	LMD/MS	Positive Immunoreactants on Immunofluorescence
1	AL-κ	κ (1+), λ (+/−), IgG (+/−), IgM (+/−), C3 (+/−)
2	AL-κ	κ (3+), λ (2+), IgG (2–3+), C3 (2–3+)
3	AL-κ	κ (1+), λ (1+), IgA (1+), IgG (+/−), IgM (2+)
4	AL-κ	κ (3+), IgA (3+)
5	AL-λ	λ (2+), κ (1–2+), IgM (3+)
6	AL-λ	λ (1–2+), κ (+/−), IgG (1–2+)
7	AL-λ	λ (1+), κ (1+), C3 (3+)
8	AL-λ	λ (1+), κ (+/−), IgM (1+), IgG (+/−), IgA (+/−), C3 (+/−), C1q (+/−)
9	AL-λ	λ (2+), IgG (2+), IgM (+/−), C3 (+/−)
10	AL-λ	λ (3+), IgG (2+)
11	AL-λ	λ (1+), κ (1+), IgG (1+), IgA (1+), IgM (1+)
12	AL-λ	λ (2+), IgG (1–2+), IgM (+/−)
13	AL-λ	λ (1+), κ (1+)

Numbers in parentheses indicate the intensity of staining on a scale of 0–3+; negative immunoreactants are not listed. AL, light chain amyloidosis; LMD/MS, laser microdissection/mass spectrometry.