Severe IgG4-Related Disease in a Young Child: A Diagnosis Challenge

Figure 2

Mediastinal mass biopsy showed reactive lymph nodes presenting follicular hyperplasia with germinal centers and plasmacytic infiltrate ((a) H&E stain, 40x; (b) immunohistochemical stain for IgG, 400x; (c) immunohistochemical stain for IgG4, 400x).

(a)

(b)

(c)