Sphenoid Brown Tumor Associated with a Parathyroid Carcinoma

Figure 5

(a) Sheets of polygonal cells with clear cytoplasm and monotonous nuclei without atypia, H&E stain, ×400. (b) Thick fibrous bands, H&E stain, ×50. (c) Focal capsular invasion without perforation, H&E stain, ×50. (d) Vascular invasion, H&E stain, ×100.

(a)

(b)

(c)

(d)