Fig. 15.

Yolk sac tumour in a 26-year-old woman. (a) Sagittal and (b) axial T2-weighted images show a mixed cystic and solid mass (white arrows). (c) Axial T1-weighted image shows haemorrhagic areas with high signal intensity within the lesion (white arrowhead). (d) Sagittal and (e) axial contrast-enhanced fat-suppressed T1-weighted images show marked enhancement of the solid component (white arrows). Peritoneal fluid can also be seen (* in a, b). (f) Photomicrograph (H&E X200) shows endodermal sinus pattern with Schiller-Duval bodies; these structures are covered by tumour cells and has a central capillary