Classical seminoma comprises of large cells containing abundant cytoplasm, divided into sheets or cords by connective tissue septae. More than 95% of seminomas are classical, and they occur in men between the ages of 25 and 45. This type of tumor arises from sperm-producing cells within the male testicles, that grow uncontrollably.
This is a rare type of seminoma and mainly occurs in older men, aged 65 years or above, on average. Spermatocytic seminoma tumors grow slow and are less likely to spread to other parts of the body, in comparison to the classical seminomas. An intrascrotal mass, or painless mass, in the scrotum indicates the presence of this disease. A long-standing swelling may be noted, causing a feeling of heaviness in the testicle.