Diagnostic Tools for Testicular Cancer 

 Physical exam
The doctor will look for swelling, tenderness, lumps and enlarged lymph nodes.

 Blood tests
These tests can measure the levels of tumor markers substances often found in higher-than-normal amounts when cancer is present.

 Ultrasound
An ultrasound of the scrotum can show the presence and size of a mass in the testicle. It is also helpful in ruling out other conditions, such as swelling due to infection or a collection of fluid unrelated to cancer.
 
 Biopsy
In most cases of suspected cancer, the entire affected testicle is removed. In rare cases, the doctor may take a tissue sample before removing the testicle. 
 
 Chest X-ray
 
 CT scan
 
 MRI scan
 
 PET scan
Injected radioactive sugar collects in cancerous tissue that is detected by the scan.