Abstract
A 37-year-old (G4P3) woman was referred to our hospital at 32 weeks of gestation for the evaluation of a fetus with an intrathoracic cystic lesion. Ultrasonography and magnetic resonance imaging revealed that a fetal cystic lesion without a mucosal layer was located in the posterior mediastinum. These findings were consistent with a bronchogenic cyst. At 38 3/7 weeks of gestation, an elective cesarean section was performed because of her previous cesarean section. A female neonate without any external anomalies, weighing 2,442 g, with Apgar scores of 8 and 9, and requiring no resuscitation was born. Four weeks after delivery, the neonate was admitted because of respiratory distress due to mass effect. At right lateral thoracotomy, a 105 × 65 mm of solitary smooth-walled cyst containing serosanguineous fluid was found in the posterior mediastinum, which was excised completely. Histologic examination revealed the diagnosis of the mediastinal gastric duplication cyst. The neonate made an uneventful recovery. Accurate diagnosis is not necessary, but detection and continuous observation are logical. Although gastric duplication, particularly intrathoracic, is a rare pathology, it should be considered in the differential diagnosis of any intrathoracic cyst.
Highlights
Foregut duplication cysts are rare congenital anomalies of enteric origin; they constitute 10%–18% of all mediastinal lesions
We report a case of an intrathoracic gastric duplication cyst detected on a prenatal ultrasound (US) examination
Magnetic resonance imaging (MRI) revealed that a fetal cystic lesion was located in the posterior mediastinum without communication to surrounding organs (Figure 2)
Summary
Foregut duplication cysts are rare congenital anomalies of enteric origin; they constitute 10%–18% of all mediastinal lesions. They are further subdivided into bronchogenic, esophageal, gastric, enteric, and pancreatic cysts [1]. Gastric duplications account for less than 4% of all enteric duplications and most of them are located in the abdomen [2]. Prenatal or early neonatal diagnosis is very important to avoid a complicated course, it is sometimes difficult. We report a case of an intrathoracic gastric duplication cyst detected on a prenatal ultrasound (US) examination
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