Sonographically documented stable seminoma: a case report.

Seminoma of the testis has a diverse natural history. We report a unique case of histologically confirmed classic seminoma in a 32-year-old patient documented by ultrasound on two occasions one year apart. The tumor size did not change during that time. We explore the possibility of a dichotomy in growth within seminoma and the need to identify molecular methods to predict the subset of tumors that behave biologically less aggressive.