T Cell/Histiocyte-Rich Large B Cell Lymphoma of the Thymus: A Diagnostic Pitfall

Figure 2

Mediastinal mass, thymic THRLBCL. (a) Thymic tissue rimmed by collagenous fibrous capsule (H&E, 2x). (b) Nodular areas of B cells (CD20, 4x). (c) Distorted and compressed epithelial network (AE1 and AE3, 2x). (d) Large lymphoid cells were scattered singly among small lymphocytes (H&E, 100x). (e) The dispersed large B cell lymphoma cells and some small B lymphocytes (CD20, 40x). (f) Numerous T lymphocytes in the background (CD3, 40x).

(a)

(b)

(c)

(d)

(e)

(f)