Article ID Journal Published Year Pages File Type
9390198 Journal of Medical Ultrasound 2005 5 Pages PDF
Abstract
The ultrasonographic appearance of fetal pulmonary sequestration has been typically described as a hyperechoic mass in the thoracic cavity. We present the case of a 33-year-old woman at 24 weeks of gestation, with an echolucent cyst in the thorax of the fetus. No other congenital anomalies were noted. Color Doppler sonography failed to identify any aberrant vessel supplying the mass. After the termination of pregnancy on the patient's request, autopsy and detailed histologic examination were carried out. The reports showed an extralobar pulmonary sequestration with macrocystic appearance, simulating type I congenital cystic adenomatoid malformation proposed by Stock's classification. We suggest that the hypoechogenicity in this type of pulmonary sequestration may result from the retention of fluid in the obstructed bronchial tree. Literature on the sonographic features of pulmonary sequestration is also reviewed.
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