Instituto Fernandes Figueiras - FIOCRUZ and Hospital Universitário UFSC -  Santa Catarina, Brazil.

Case report

These are some images of the thymus obtained prenatally and postnatally. The structure of the thymus is sometime so well visualized that can be a source of confusion and can imitate thoracal pathology.

Images 1, 2: Third trimester scans showing sagittal and transverse views of the thorax with the marked thymus (bordered by arrows on the image 2).

Images 3, 4:  Third trimester scans showing sagittal and transverse views of the thorax with the marked thymus.

Images 5, 6:  Third trimester scans showing sagittal and transverse views of the thorax with the marked thymus.

Video 1:  Video shows a third trimester transverse scan of the thorax at the level of three-vessel-view of the heart with the marked thymus anteriorly.

Images 7, 8: Postnatal ultrasonography showing thymus of the neonate.

Images 9, 10: Postnatal ultrasonography showing thymus of the neonate.