Atypic thoracic cyst
* Department of Gynecology, Félix Guyon’Hospital, 97400 Saint-Denis, Ile de la Réunion, France.
** Department of Radiology, Félix Guyon’Hospital, 97400 Saint-Denis, Ile de la Réunion, France.
This is a case of a 35-year-old woman G3P2 (160 cm, 95 kg) who was referred to our antenatal unit at 23 weeks of gestation. Her personal and family history was non-contributive.
The ultrasound exam at 23 weeks revealed an isolated cyst, located in the left thorax, behind left auricula (Image 1, 2).
The follow-up exams at 26 weeks, 27 weeks, 29 weeks, 31 weeks (Image 3-6) confirmed the left localized-thoracic cyst without any complications. We could observe a peripheric hyper-echoic aspect. The cardiac exam was normal. There were no signs of heart compression or heart failure.
The follow-up scans had the same appearance of the cyst.
The suspected diagnosis was bronchogenic cyst. Patient delivered by cesarean section at 38 weeks. The neonatal examination was normal. Thoracic radiography was done. CT scan confirmed the finding of the isolated cyst in the left thorax. The diagnosis suspected was in fact pulmonary adenomatoid cyst. The neonate had no episode of hypoxia.
The newborn underwent thoracotomy on the 6th month of life. Cyst was removed. The final pathology was "pulmonary adenomatoid cyst".
Image 1-6: The thoracic cyst seen at 23 weeks and later.
Image 7, 8: Xray and CT confirmed the finding of the isolated cyst in the left thorax.