Fig. 5From: Extensive surgical resections for rare pleural neoplasms: a single-center experience with a yolk sac tumor and synovial sarcomaHistopathology of the pleural yolk sac tumor: (A-B) hematoxylin and eosin staining of a malignant tumor with a hepatoid aspect. (C-D) SALL4 and alfa-foetoprotein staining of the tumor cells proving the germ cell origin. These elements together plead for a hepatoid variant of a yolk sac tumorBack to article page