What causes the size difference in testicles

Patient's question:

Hello doctor, I would like to ask about the reasons why the testicles are different in size. I noticed that my two testicles are not the same size, and I'm a bit worried. I don't know if everyone is like this or if it's something wrong with me. Will it affect fertility? What are the reasons for the difference in testicle size?

Doctor's answer:

Hello, under normal circumstances, the size of the testicles on both sides is not the same, but they should be relatively similar. If one testicle is significantly larger than the other, it is not normal. There are two possible reasons: one is that the larger testicle may have symptoms of hydrocele, in which case an ultrasound examination is needed for diagnosis. Surgical treatment may be necessary if necessary. The other possibility is that the smaller testicle shows signs of atrophy, which also requires an ultrasound examination to determine. Such conditions need to be treated in a timely manner, and there will be no adverse effects after treatment.

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