Conclusion
Primary yolk sac tumors are rare in the adult population. We described a
case of a 40-year-old male here who presented with left testicular
swelling and was found to have a primary yolk sac tumor with extension
into the left retroperitoneal space as well as bilateral pulmonary
metastasis. He was treated with BEP chemotherapy with good response and
has gotten orchiectomy post treatment for residual disease. This report
highlights the necessity of accelerated work up required for adult post
pubertal patients presenting with possible testicular tumors given the
possible aggressive nature of the underlying disease.