睾丸鞘膜积液在成人及儿童较多见,但在胎儿则较少见,一般不易被发现。近年来,我们在行常规B超检查时无意中先后发现5例,现将其中一典型病例报告如下。孕妇25岁,孕34周。B超检查见胎儿会阴部有一囊状突起物,呈4.5×3.0×4.0cm液性暗区,其间有一光带相隔,分为左右两部,内各有—约0.5×1.0cm之小光团(见附图);胎儿头部等器官声象图均无明显异常改变;羊水量正常。提示:胎儿睾丸鞘膜积液。3周后自然分娩。婴儿出生后,阴囊明显肿大,呈水肿状,两侧睾丸可及。诊断:先天性睾丸鞘膜积液。1周后阴囊逐渐变小。 Testicular hydrocele in adults and children more common, but less common in the fetus, the general is not easy to be found. In recent years, we routinely B-inadvertently discovered five cases inadvertently, now one of the typical cases are reported as follows. Pregnant women 25 years old, 34 weeks pregnant. B ultrasound examination see the perineum of the fetus has a sac-like projections, was 4.5 × 3.0 × 4.0cm liquid dark area, during which there is a light belt separated into about two, each have - about 0.5 × 1.0cm small light group (See photo); fetal head and other organs were no abnormal changes in the sonogram; amniotic fluid volume is normal. Tip: fetal testis hydrocele. After 3 weeks of natural childbirth. After the baby was born, the scrotum was obviously swollen and showed an edema on both sides of the testicles. Diagnosis: Congenital testicular hydrocele. 1 week after the scrotum becomes smaller.