右上方可见生精小管的灶状萎缩。儿童感染腮腺炎病毒可致睾丸炎，是这种情况最常见的原因。不过这种感染通常不会引起睾丸明显萎缩影响精子的数量。
There is focal atrophy of tubules seen here to the upper right. The most common reason for this is probably childhood infection with the mumps virus, which produces a patchy orchitis. However, it is unusual for this infection to cause enough atrophy to significantly affect the sperm count.
