Fig. 3.

Histological findings a Low-power view showing three distinct components of the tumour: conventional cribriform-type AdCC (red arrow), sarcomatoid component (yellow arrow) and intervening poorly differentiated carcinoma component (black arrow) (H&E stain, × 100). b The sarcomatoid component is composed of pleomorphic spindle cells arranged in vague fascicles and sheets, exhibiting marked nuclear anaplasia and brisk mitotic activity (H&E stain, × 400). c The conventional AdCC composed of basaloid cells arranged in cribriform pattern (H&E stain, × 200)