Article Figures & Data
Figures
- FIG 1.
Illustration of the medullary cap morphologic characteristics: A, Smooth; B, Stick sign; C, Globular; D, Step sign; E, Caterpillar sign.
- FIG 2.
MR imaging and ultrasound showing the medullary cap in 12 patients, midsagittal view. A, Patient 1; B, Patient 2; C, Patient 3; D, Patient 4; E, Patient 5; F, Patient 6; G, Patient 7; H, Patient 8; I, Patient 9; J, Patient 11; K, Patient 12; L, Patient 13. Of note, patient 10’s MR imaging is separately shown in the Online Supplemental Data.
- FIG 3.
A, Axial microscopy photograph of the medulla oblongata of patient 2 at 35 gestational weeks. The right-posterior bulge of the medulla oblongata (RMO) contains many mature neurons, consistent with a hamartoma, connected to the cerebellum. The inferior olivary nuclei (ON) are well-developed, and the pyramidal tracts (PT) are intact. B, Postmortem photograph of patient 3 depicts the fetal posterior fossa after removal of the occipital bone, performed at 17 gestational weeks. Note the thickening and internal rotation of the RMO, producing the medullary cap shape. Cbl indicates cerebellum; FM, opening of the foramen of Magendi.
