Female, 14 years old, with Chiari and syrinx, new syrinx growth on recent MRI. The cerebral tonsils descend approximately 5 mm below the level of the foramen magnum, unchanged from prior. Moderate crowding of foramen magnum is redemonstrated. Biphasic CSF flow is noted at the tonsillar tips, without demonstrable flow posteriorly, unchanged.A syrinx cavity is redemonstrated within the central aspect of the cervical cord. The most prominent component begins at the mid C6 level and continues inferiorly to the upper T1 level. At its point of maximum caliber, the syrinx measures up to 4 mm transverse x 3 mm AP which is unchanged. A smaller thoracic syrinx is present demonstrating a skip morphology, extending as far inferiorly as T10/11. The most prominent component is posterior to T4 measuring 2 mm transverse by 1-2 mm AP.Straightening of the cervical lordosis is likely positional. Alignment is otherwise unremarkable. Vertebral body height and morphology are within normal limits. No pathologic marrow replacement or edema is detected. No significant abnormalities of the intervertebral discs are seen. The central canal and neural foramina are patent. The conus is normal in appearance and morphology and terminates at L2.
1.The cerebral tonsils descend approximately 5 mm below the level of the foramen magnum, unchanged from prior. Biphasic CSF flow is noted at the tonsillar tips, without demonstrable flow posteriorly, unchanged.2.A syrinx cavity is redemonstrated within the central aspect of the cervical cord. The most prominent component begins at the mid C6 level and continues inferiorly to the upper T1 level. At its point of maximum caliber, the syrinx measures up to 4 mm transverse x 3 mm AP which is unchanged. 3.A smaller thoracic syrinx is present demonstrating a skip morphology, extending as far inferiorly as T10/11. The most prominent component is posterior to T4 measuring 2 mm transverse by 1-2 mm AP.