Common complications of seminoma include recurrence, lymph node metastasis, distant metastasis, and secondary malignancies. Prognosis is generally good for all stages with greater than 90% cure rate. Seminoma grows slower than non-seminomatous germ cell tumors. The International Germ Cell Cancer Consensus Group divides seminoma into two prognosis groups: good and intermediate. The symptoms of seminoma usually develop in the second to forth decade of life (15-35 years), and start with symptoms such as a painless testicular lump, abnormal semen analysis, possibly an acute onset testicular pain.

• The symptoms of seminoma usually develop in the second to forth decade of life (15-35 years), and start with symptoms such as a painless testicular lump, abnormal semen analysis, possibly an acute onset testicular pain.^[1]
• Seminoma grows slower than non-seminomatous germ cell tumors.

Common complications of seminoma include:^[2]

• Recurrence
• Lymph node metastasis
• Distant metastasis
• Increased risk of seminoma in the remaining testicle
• Increased risk of other cancers (second malignancies)

• Mesothelioma and cancer of the lung
• Colon cancer
• Bladder cancer
• Pancreatic cancer
• Stomach cancer

• Prognosis for stage I is excellent, and the survival rate of patients with seminoma for satgr I is approximately 100%.^[3][4]
• Prognosis for stage II is generally good, the 5-year mortality survival rate of patients with satge II of seminoma is approximately 97%.
• Prognosis for stage III is generally good, the 5-year mortality survival rate of patients with satge III of seminoma is approximately 85%.