Figure 1: (A) Chest X-ray PA view showing mediastinal widening (red arrow). (B) Axial section of computed tomographic scan showing anterior mediastinal mass (green arrow). (C) H and E section (×100) of the mass showing parenchyma comprising sheets of spindle cells with minimal lymphoid cells (arrow), arranged in short, storiform fascicles, vague whorls and interrupted by cystic spaces with focal microcystic pattern. Vascularity is increased with prominent perivascular spaces. Consistent with WHO-Type A thymoma.