(a)

(b)

(c)

(d)

Figure 3: (a) Immuno.histochemistry showed that germinal centers mainly comprised CD20 (+) B lymphocytes (100x magnification) (b) Germinal centers mainly comprised LCA (+) lymphocytes (100x magnification) (c) T lymphocytes in interfollicular area and surrounding germinal centers were CD45RO (+) (100x magnification) (d) Germinal centers mainly comprised CD20 (+) B lymphocytes (400x magnification).