Histologic Changes

A small portion of the tumor shows differentiated, pseudostratified, ciliated, columnar epithelium surrounded by a layer of spindled, pink smooth muscle cells. This represents a mature airway structure. Note the cilia and terminal bars in the inset.

Diagnoses: 1) Testicular mixed germ cell tumor, predominantly yolk sac type with small foci of embryonal carcinoma and mature teratoma (above). The tumor invaded lymphatics and blood vessels of the spermatic cord but did not invade the tunica albuginea (capsule of testis). 2) Pelvic metastasis with focal destruction of the left pelvis and femoral head. 3) Metastases to L4, T12, the proximal right humerus, retroperitoneal lymph nodes, and lung.

Clinical summary Clinical summary continued

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