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. Author manuscript; available in PMC: 2018 Jun 13.
Published in final edited form as: Surg Neurol. 2009 Jul;72(1):20–35. doi: 10.1016/j.surneu.2009.03.008

Fig. 6.

Fig. 6

Midsagittal T1-weighted MR images before and after SFT in 28-year-old woman with CM-I/TCS. A: Preoperative scan showing tonsillar herniation extending to superior arch of C1. Morphometric measurements revealed elongation of brain stem (BSL = 60.1 mm), downward displacement of medulla (MH 7.7 mm), downward displacement of cerebellum (4VH = 14.4 mm), herniation of cerebellar tonsils (TH = 12.3 mm), and enlargement of FM (transverse diameter = 34.3 mm). B: Postoperative scan 7 months after SFT showing resolution of CM-I. Morphometric measurements revealed normalization of brain stem length (BSL = 53.7 mm), resolution of hindbrain displacement (MH = 12.4, 4 VH = 4.0 mm), and ascent of cerebellar tonsils (TH = 1.5 mm).