Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
Department of Ultrasound, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China.
Medicine (Baltimore). 2023 Oct 27;102(43):e35700. doi: 10.1097/MD.0000000000035700.
Female genital tract abnormalities are relatively uncommon and usually discovered accidentally. And hymen prolapse is even rarer, which is asymptomatic and is commonly found during the examination of the baby external genitals.
Here, we report a case of fetal genital abnormality detected at 32 weeks of gestation.
At 32+1 weeks of pregnancy, ultrasound showed taht an iso-echoic mass of about 8 mm × 5 mm was protruding from the genitalia, and at 36 weeks, ultrasound showed that an iso-echoic mass of about 9 mm × 5 mm could be seen protruding from the genitalia, and its morphology was similar to the result of the 32-week data. At 39 weeks a baby girl was naturally delivered. Physical examination showed the female external genitalia, part of the hymen protruded into the vaginal orifice. Finally, the clinical diagnosis was hymen prolapse.
No treatment was carried out. Reexamination at 11 days after birth revealed a significantly smaller prolapse than before. Since the postpartum follow-up, the baby has been in good condition, the hymen has gradually returned, and the genitals are all normal.
Regardless of the confidentiality of prenatal tests regarding the sex of the fetus, prenatal ultrasound should be used to fully evaluate the morphology and structure of each system including the reproductive system of the fetus when screening fetal malformations. The purpose of this case is to remind doctors of the rigorous degree of genital examination, increase the detection rate, and save the life of the fetus.
女性生殖道畸形相对少见，通常为偶然发现。而处女膜脱垂更为罕见，多为无症状，常于婴儿外阴检查时发现。
我们报告了 1 例孕 32 周时发现的胎儿生殖器异常。
孕 32+1 周超声显示外阴可见一直径约 8mm×5mm 等回声团块向外突出，孕 36 周时超声显示外阴可见一直径约 9mm×5mm 等回声团块向外突出，形态与孕 32 周时相似。孕 39 周时自然分娩 1 女婴。查体见女性外阴，部分处女膜突入阴道内。最终临床诊断为处女膜脱垂。
未予治疗。产后 11 天复查，脱垂较前明显缩小。产后随访至今，婴儿情况良好，处女膜逐渐退缩，外阴及生殖器均正常。
无论产前检查胎儿性别是否保密，产前超声都应用于筛查胎儿畸形时充分评估胎儿各系统包括生殖系统的形态和结构。本病例旨在提醒医生重视外阴检查的严谨程度，提高检出率，挽救胎儿生命。
