Female, 13 years old, with syrinx of the cervical and thoracic spinal cord, 3 month follow-up to evaluate for change as previous MRI had demonstrated significant changes. Redemonstrated is evidence of prior suboccipital craniectomy and resection of the posterior arch of C1. The foramen magnum remains somewhat crowded with a relatively pointed configuration of the cerebellar tonsils, unchanged in appearance.Since the prior examination, the patient's cervicothoracic syrinx has decreased in caliber, now measuring 11 x 8 mm at the C6/7 level (previously 14 x 10 mm.) And 8 x 7 mm at the T6 level (previously 11 x 10 mm). As before, the syrinx cavity extends from C1 level to the T11 level, although both the cranial and caudal extent demonstrate a narrower tapering compared to prior. As before the syrinx contains multiple septations.Slight reversal of the cervical lordosis is seen. Spinal alignment is otherwise unremarkable. Vertebral body heights are preserved. No areas of marrow replacement or edema are seen. The thyroid gland is diffusely bulky and heterogeneous with a superimposed 15 mm T2 hyperintense lesion in the left thyroid lobe, unchanged in appearance.
1.Stable findings related to prior Chiari decompression. The foramen magnum remains somewhat crowded but appears similar to the prior study.2.Interval decrease in dimension of the cervicothoracic syrinx is demonstrated.3.The thyroid gland is incidentally remains prominent and diffusely heterogeneous with a focal lesion in the left lobe. 