Figures at a glance

Figure 1

Figure 2

Figure 3

FIGURE 1

Figure 1: chest CT scan with contrast. (A) axial section, (B) Sagittal section

FIGURE 2

Figure 2A: Diffuse effacement of thymic architecture by sheets of histiocytes (hematoxylin and eosin stain, 100x) Figure 2B: Sheets of histiocytes with surrounding lymphoplasmacytic infiltrate (hematoxylin and eosin stain, 200x).

Figure 2C: histiocytes engulfing intact lymphocytes referred to as emperipolesis “arrow head” (hematoxylin and eosin stain, 400x). Figure 2D: histiocytes engulfing intact lymphocytes referred to as emperipolesis “arrow head” (hematoxylin and eosin stain, 400x).

FIGURE 3

Figure 3A: Diffuse positive staining for CD68 “histiocytic marker” (CD68 immunostain, 400x). Figure 3B: Diffuse nuclear and cytoplasmic staining for S100 (S100 immunostain, 400x).

Figure 3C: Focal nuclear staining for cyclin D1 (Cyclin D1 immunostain, 400x). Figure 3D: Negative staining for CD1a (CD1a, 400x).