Figure 4b. Massive lymphatic malformation in a newborn girl who was in respiratory distress and had an obvious calvarial, cervical, and thoracic mass. Coronal T2-weighted MR image (2,200/20) (a) and axial T1-weighted MR image (570/15) (b) show a huge, multiseptated, cystic mass with hemorrhagic areas (arrows in a) and fluid-fluid levels (arrowheads in b). The mass extends to the cervical, mediastinal, axillary, and pulmonary compartments. The karyotype was normal.