Final answer:
Testicular cancer can be differentiated from hydrocele and epididymitis through diagnostic tests such as ultrasound and blood tests. The diagnosis for testicular cancer is based on the detection of a lump in the testis, followed by further tests like ultrasound, blood tests, and CT scans.
Step-by-step explanation:
Testicular cancer can be differentiated from hydrocele and epididymitis through diagnostic tests such as ultrasound and blood tests. Hydrocele is a buildup of fluid around the testicle, while epididymitis is inflammation of the epididymis. The diagnosis for testicular cancer is based on the detection of a lump in the testis, followed by further tests like ultrasound, blood tests, and CT scans to determine the location, size, and characteristics of the lump and if the disease has spread beyond the testis.