Haemorheological parameters in alopecia areata.

Whole blood, plasma and relative viscosities and red cell filterability have been investigated in 15 patients with Alopecia areata (A.A.) and in 9, age and sex-matched, normal subjects. Erythrocyte filtration time resulted to be significantly increased in alopecic subjects as compared to the normal subjects. Such parameter also showed a good correlation (r = 0.752) with relative viscosity. Whole blood, plasma and relative viscosities were not significantly different from normal subjects.