Abstract
RATIONALE: Posterior urethral valve is a rare disease, prenatal diagnosis and prognosis evaluation are particularly important. PATIENT CONCERNS: A 25-year-old pregnant woman was found enhanced parenchymal echo in both kidneys, subcapsule urinary cyst formation in both kidneys, bladder enlargement of the fetus during prenatal ultrasonography at 25 W + 4 of gestation. It was accompanied by fetal pericardial effusion and oligohydramnios. DIAGNOSES: Fetal posterior urethral valve. INTERVENTIONS: After detailed prenatal evaluation, labor was induced and fetal autopsy was performed. OUTCOMES: Fetal autopsy pathology confirmed the prenatal judgment. LESSONS: Prenatal ultrasonography can diagnose posterior urethral valve through typical image manifestations and can make a certain judgment for prognosis evaluation.