Anomalies of the urogenital sinus, which is a transient feature of the early human embryological development, are rare birth defects. Urogenital sinus abnormalities commonly present as pelvic masses, hydrometrocolpos, or ambiguous genitalia and most commonly occur within the context of congenital adrenal hyperplasia. Anomalies of the urogenital sinus requires surgical repair. We experienced a case of a female newborn with congenital urogenital sinus abnormality in which the early diagnosis helped us to prevent complications by decompressing the vagina soon after birth. Antibiotic prophylaxis was sufficient to avoid infections and to decompress the genitourinary system, thus allowing a deferred elective surgery to correct the sinus.

中文翻译：

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先天性泌尿生殖窦异常的围产期诊断

泌尿生殖窦异常是人类早期胚胎发育的短暂特征，是罕见的出生缺陷。泌尿生殖窦异常通常表现为盆腔肿块、阴道积水或生殖器模糊，最常见于先天性肾上腺增生。泌尿生殖窦异常需要手术修复。我们经历过一例患有先天性泌尿生殖窦异常的女性新生儿，早期诊断有助于我们在出生后立即对阴道减压，从而预防并发症。抗生素预防足以避免感染并减轻泌尿生殖系统的压力，从而允许推迟择期手术来矫正鼻窦。