1. Testicular enlargement: This is the result of endless multiplication and proliferation of tumor cells. The shape of the enlargement is not uniform, sometimes very irregular, or the side of the testicle with tumor can be enlarged and protrude extraordinarily. 2. Hard texture of the testicle: The testicle looks like a stone with a hard texture when touched by hand, which is significantly different from the testicle that is uniformly swollen and has a soft texture when inflammation occurs in the common testicle. Although the testicles are hard, there is no pain when you press and touch them, which is also different from orchitis. 3. Heavy testicular sensation: Since testicular tumor is formed by the massive growth of tumor cells, it is a substantial lump. After growing to a certain extent, the weight of testicle increases suddenly, and patients will have a heavy downward feeling and even affect walking. If you hold up the testicle with your hand, it is like holding a stone, and there is a certain sense of weight. 4. Negative transillumination test: In general, when syringomyelia is present, the transillumination of scrotum and testes is enhanced and the transillumination test is positive. However, if the testicular tumor grows dense and solid, and there is no liquid inside, the transmittance will be greatly weakened.