A number of tests may be performed to investigate symptoms of testicular cancer and confirm a diagnosis. Some of the more common tests include:

• a physical examination and patient history
• examination of a blood sample
• imaging of the testicle and surrounding organs, which may include ultrasound, computed tomography (CT) scan or magnetic resonance imaging (MRI)
• taking a sample of tissue (biopsy) from the testicle for examination under a microscope.