Olfactory bulb volume in patients with normal-pressure hydrocephalus: an MRI evaluation.

Clinical Radiology
A ÖzdemirH M Mutlucan

Abstract

To investigate changes in olfactory bulb (OB) volume in patients with idiopathic normal-pressure hydrocephalus (NPH). This multicentric retrospective study included a test group of 23 patients with NPH (10 male and 13 female patients) and a control group of 27 healthy participants without hydrocephalus. The OB volume in all participants had been measured using cranial magnetic resonance imaging (MRI). In the NPH group, positivity for disproportionately enlarged subarachnoid space hydrocephalus (DESH) was also evaluated. The OB volumes of the NPH group (R 38.29 ± 9.34 mm3 and L37.52 ± 9.59 mm3) were significantly lower than those of the control group (R 45.87 ± 7.33 mm3 and L48.41 ± 7.62 mm3) bilaterally. There were no significant differences between right and left OB volumes in the NPH group. Nine of the 23 patients were DESH positive and 14 were DESH negative. There were no significant differences between OB volumes of the DESH positive and DESH vpatients in the NPH group. In both groups, there was a positive correlation between right and left OB volumes. There were no significant correlations between OB volumes and age or gender. In the NPH group, there were no significant correlations between DESH positivity and OB volumes. ...Continue Reading

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