Lymphadenopathy is common in young people. However, in most, it is caused by benign or inflammatory diseases, and malignant disease as the cause is rare. We report the case of a 27-year-old man who visited our hospital with the chief complaint of a left neck swelling and was diagnosed as having testicular malignancy with cervical lymphadenopathy. Computed tomography revealed multiple enlarged lymph nodes, with some showing a necrotic component. Lymph node biopsy led to the diagnosis of cervical lymph node metastasis from a carcinoma. On the basis of the age and sex of the patient, and the histopathological findings, we suspected a primary tumor of the testis. We referred the patient to the urology department, where he received prompt treatment. In a patient presenting with multiple lymphadenopathy in the supraclavicular fossa, lymph node biopsy should be considered, even if the patient is young.
