Figure 3

Malignant Steroid cell tumor, NOS. Microscopic appearance: Cells with irregular nuclei or atypia (A, H&E, 40×), and mitosis (B, H&E, 20×) are arranged in a diffuse pattern of columns or nests separated by a rich vascular network. Diffuse hemorrhage and necrosis are observed (C, H&E, 20×). The presence of intravascular tumor embolus further supports the diagnosis of malignancy (D, H&E, 10×).