White matter and deep gray matter hemodynamic changes in multiple sclerosis patients with clinically isolated syndrome
Magnetic Resonance in Medicine,  Clinical Article

et al. – The data provide strong evidence that hemodynamic changes—affecting both white and deep gray matter (DGM)—may occur even at the earliest stage of multiple sclerosis, with clinically isolated syndrome (CIS) patients being significantly different than relapsing–remitting multiple sclerosis patients.

Methods
  • Thirty normal volunteers were studied as controls.
  • Cerebral blood volume, cerebral blood flow (CBF), and mean transit time values were estimated.
  • Normalization was achieved for each subject with respect to average values of CBF and mean transit time of the hippocampi's dentate gyrus.
  • Measurements concerned three regions of normal white matter of normal volunteers, normal appearing white matter of CIS and patients with relapsing–remitting multiple sclerosis, and DGM regions, bilaterally.

Results
  • All measured normal appearing white matter and DGM regions of the patients with CIS had significantly higher cerebral blood volume and mean transit time values, while averaged DGM regions had significantly lower CBF values, compared to those of normal volunteers (P < 0.001).
  • Regarding patients with relapsing–remitting multiple sclerosis, all measured normal appearing white matter and DGM regions showed lower CBF values than those of normal volunteers and lower cerebral blood volume and CBF values compared to patients with CIS (P < 0.001).

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