The tumor appears as a fairly well circumscribed, pale, fleshy, homogeneous mass
Seminoma of the testisLarge cells with distinct cell borders, clear cytoplasm, rounded nuclei, prominent nucleoli, and a sparse lymphocytic infiltrate.
Seminoma of the testis
There is diffuse proliferation of tumor cells with characteristic spireme-type chromatin pattern
Spermatocytic seminoma
Embryonal ca testis
This shows solid nodular invasive (ill-defined) cut surface with numerous areas of necrosis and hemorrhage.Sheets of undifferentiated cells as well as primitive glandular differentiation. The nuclei are large and hyperchromatic with prominent nuclei
Embryonal carcinoma
Embryonal carcinoma
A, Low-power photomicrograph demonstrating areas of loosely textured, microcystic tissue and a papillary structure. B, Higher power photomicrograph demonstrating characteristic hyaline droplets within the microcystic areas of the tumor.
Yolk sac (endodermal sinus) tumor
Pleomorphism and hyaline globules in yolk sac tumor of testis.
Schiller-Duval body in yolk sac tumor of testis.The tumour shows cytotrophoblastic cells with central nuclei (arrowhead, upper right) and syncytiotrophoblastic cells with multiple dark nuclei embedded in eosinophilic cytoplasm (arrow, middle). Hemorrhage and necrosis are prominent.
Choriocarcinoma
These tumors contain mature cells from endodermal, mesodermal, and ectodermal lines. Pictured here are four different fields from the same tumor containing (A) neural (ectodermal), (B) glandular (endodermal), (C) cartilaginous (mesodermal), and (D) squamous epithelial elements.
Testicular teratomas
Mature teratoma testis gross
There are multiple cystic areas, lobules of mature adipose tissue, and shiny solid nodules corresponding to well-differentiated cartilage.Large islands of cartilage are seen surrounding well-differentiated glandular structures.