Korean J Obstet Gynecol.  2010 Jan;53(1):58-62. 10.5468/kjog.2010.53.1.58.

A case of pulmonary sequestration mimicking mediastinal mass detected by prenatal ultrasonography

  • 1Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea. yhkim522@yuhs.ac


Pulmonary sequestration is a developmental anomaly of broncho-pulmonary foregut with nonfunctioning parenchymal tissue, which usually supplied by systemic circulation. Pulmonary sequestration is detected by ultrasonography as a homogeneous echogenic mass and also by Doppler blood flow from systemic circulation to the mass. Pulmonary sequestration is classified into intralobar type and extralobar type. Extralobar type accounts for only 15~25% of the cases and it is subdivided into intrathoracic forms, which are most commonly found and extrathoracic type, which includes intraabdominal, retroperitoneal, or mediastinal masses. We report a rare case of prenatal detection of mediastinal mass with a brief review of literatures, which was confirmed to be a pulmonary sequestration by surgical mass excision after birth.


Mediastinal mass; Pulmonary sequestration; Prenatal ultrasound

MeSH Terms

Bronchopulmonary Sequestration
Ultrasonography, Prenatal


  • Figure 1 Transverse ultrasound image of fetal thorax, demonstrating about 1.2×1.1 cm sized well-defined mass at 21 weeks' gestation.

  • Figure 2 Postnatal computed tomography scan obtained at 2 days of age, demonstrating about 2.2×1.4 cm sized heterogeneously enhancing mass in the posterior mediastinum.

  • Figure 3 Postnatal ultrasound of neonatal chest obtained at 3 days of age, demonstrating posterior mediastinal echogenic mass (left), feeding artery from left gastric artery (right).

  • Figure 4 Histopathologic examination showing pulmonary sequestration consisting of abnormal feeding vessels (left), alveolar space, cartilage, bronchial epithelium (right) (hematoxylin-eosin stain, original magnification ×40).


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