[A CASE REPORT OF A METACHRONOUS BILATERAL TESTICULAR TUMOR AFTER LEFT UNDESCENDED TESTIS SURGERY]

A 53-year-old man underwent testicular fixation for a left undescended testicle at the age of 10 and a right high orchiectomy for a testicular tumor at the age of 35. He presented to our hospital with awareness of swelling in the left scrotal contents for the past month. Scrotal ultrasonography revealed a left testicular tumor, and contrast-enhanced abdominal CT showed a heterogeneous mass in the left scrotum with infiltration of the scrotal skin, as well as pathologically enlarged left inguinal and para-aortic lymph nodes. The pathology confirmed seminoma. The patient was treated with four courses of postoperative chemotherapy, resulting in a complete resolution (CR) of the lymph node metastasis. He has since remained free of recurrence.