OBJECTIVE: Pathological studies showed both pontine transverse (cortico-ponto-cerebellar) and longitudinal (corticospinal) fibers degenerate in MSA. The objective was to investigate the association between the development of cross sign, degenerations of pontine fibers, and the frequency of pyramidal signs in MSA. METHODS: Patients with MSA (n=26) and healthy subjects (n=27) were enrolled in this study. Whole pontine transverse and longitudinal fibers were individually traced by diffusion tensor tractography. FA was calculated along each entire tractography. Cross sign was graded as: 0, no cross sign; 1, anterior-posterior line only; and 2, complete cross sign. T2-hyperintense MCPs was graded as: 0, no change; 1, slight signal change; and 2, severe signal change. FA of pontine fibers in MSA patients and that in healthy subjects was statistically evaluated by ANOVA with an overall statistical significance level of 0.05. The frequency of pyramidal signs in MSA was compared between each cross and MCP grade. RESULTS: FA of pontine transverse fibers in MSA patients decreased with the development of cross sign. FA of Cross 2 was significantly lower than that of healthy subjects (p=0.003). As regards pontine longitudinal fibers, FA decreased when cross sign was completed. The frequency of pyramidal signs in MCP 2 and 1 was higher than that in MCP 0. CONCLUSION: Pontine transverse fibers degenerate as cross sign develop, and degenerations of pontine longitudinal fibers begin, or even accelerate when cross sign becomes apparent. Pyramidal signs are frequently present when T2-hyperintense MCPs are clearly observed.
OBJECTIVE: Pathological studies showed both pontine transverse (cortico-ponto-cerebellar) and longitudinal (corticospinal) fibers degenerate in MSA. The objective was to investigate the association between the development of cross sign, degenerations of pontine fibers, and the frequency of pyramidal signs in MSA. METHODS:Patients with MSA (n=26) and healthy subjects (n=27) were enrolled in this study. Whole pontine transverse and longitudinal fibers were individually traced by diffusion tensor tractography. FA was calculated along each entire tractography. Cross sign was graded as: 0, no cross sign; 1, anterior-posterior line only; and 2, complete cross sign. T2-hyperintense MCPs was graded as: 0, no change; 1, slight signal change; and 2, severe signal change. FA of pontine fibers in MSA patients and that in healthy subjects was statistically evaluated by ANOVA with an overall statistical significance level of 0.05. The frequency of pyramidal signs in MSA was compared between each cross and MCP grade. RESULTS: FA of pontine transverse fibers in MSA patients decreased with the development of cross sign. FA of Cross 2 was significantly lower than that of healthy subjects (p=0.003). As regards pontine longitudinal fibers, FA decreased when cross sign was completed. The frequency of pyramidal signs in MCP 2 and 1 was higher than that in MCP 0. CONCLUSION: Pontine transverse fibers degenerate as cross sign develop, and degenerations of pontine longitudinal fibers begin, or even accelerate when cross sign becomes apparent. Pyramidal signs are frequently present when T2-hyperintense MCPs are clearly observed.
Authors: M J Hoch; M T Bruno; A Faustin; N Cruz; L Crandall; T Wisniewski; O Devinsky; T M Shepherd Journal: AJNR Am J Neuroradiol Date: 2019-01-31 Impact factor: 3.825
Authors: Elke R Gizewski; Stefan Maderwald; Jennifer Linn; Benjamin Dassinger; Katja Bochmann; Michael Forsting; Mark E Ladd Journal: Neuroradiology Date: 2013-12-20 Impact factor: 2.804
Authors: M J Hoch; S Chung; N Ben-Eliezer; M T Bruno; G M Fatterpekar; T M Shepherd Journal: AJNR Am J Neuroradiol Date: 2016-02-11 Impact factor: 3.825
Authors: J Brettschneider; D J Irwin; S Boluda; M D Byrne; L Fang; E B Lee; J L Robinson; E Suh; V M Van Deerlin; J B Toledo; M Grossman; H Hurtig; R Dengler; S Petri; V M-Y Lee; J Q Trojanowski Journal: Neuropathol Appl Neurobiol Date: 2016-10-18 Impact factor: 8.090
Authors: Yulia Surova; Filip Szczepankiewicz; Jimmy Lätt; Markus Nilsson; Bengt Eriksson; Alexander Leemans; Oskar Hansson; Danielle van Westen; Christer Nilsson Journal: PLoS One Date: 2013-06-13 Impact factor: 3.240